Across:
1 Where you're bound to find Ronnie? (find ronnie/moustache UNDER ONE'S NOSE) In the obvious place, you'll find! (UNDER ONE'S NOSE),
10 Order (= anagram indicator) hot flan (hot flan = NOT HALF) – is it fairly divided? No! (not fairly divided = NOT HALF),
11 Bats in a (bats in a) building (= anagram indicator) (bats in a = ABSTAIN) – don’t touch them (ABSTAIN),
12 Part of the complexity (part of the ‘complEXITy’ = EXIT) is way out (EXIT),
13 Working for (UNDER) all sides today from the start (UNDER on all sides of today’s grid),
15 Part of the plane (plan of the aeroplane = NOSE) found at the end of 1 across (found at end of ‘under one’s nose’ = NOSE),
17 Either way (= palindrome indicator), it’s covered up by Hindu deity (covered up by ‘hinDU Deity’ = DUD) in Turkey (turkey/flop = DUD),
19 Things you hear in church (ORGANS) – were they donated? (ORGANS),
21 Sample of revolutionary (= reverse indicator) cupboard nutrients (sample of revolutionary ‘cupboARD NUTrients’ = ardnut = TUNDRA) from much of Siberia (TUNDRA),
22 A snaky type (RATTLER) put off one’s stroke (RATTLE-) on second green (second ‘gReen’ = -R) (RATTLER),
23 Punch (EGGNOG) knocks over (= reverse indicator) great (-G) individual (one = -E-NO-) around middle of fight (middle of ‘fiGht’ = -G-) for good (G-) (EGGNOG),
25 Fill your boots (ENRICH) in marsh (fen) without Furlong (f) (‘fen’ without ‘f’ = EN-) rolling in it (-RICH) (ENRICH),
27 Side (RIM) of pastrami without pasta (‘pastrami’ without ‘pasta’ = rmi = RIM),
29 Retiring (= reverse indicator) around Des Moines (around ‘DEs moinES’ = dees = SEED) by pit (pit/stone = SEED),
30 Sun (sun) comes up (= reverse indicator) (sun = -NUS) behind motorway (MI-) (MINUS) takeaway (take away = MINUS),
31 Get lost (shoo) on satnav (= homophone indicator) (‘shoo’ = ‘SHOE’) coming from old woman’s accommodation (The Old Woman who lived in a SHOE),
34 Hostility (ILL WILL) to two testaments (will + will), one missing the introduction (w) (‘will’ missing ‘w’ = ill) (ILL WILL)
35 Looking back (= reverse indicator), bird (emu = -UME) living in Europe (Serb) for the most part (b) (‘Serb’ without ‘b’ = ser = -RES-), takes lead from Prime (lead from ‘Prime’ = P-) (PRESUME) Suspect (PRESUME),
36 Where you might find a nuisance (UNDER ONE’S FEET) in The Ground presumably? (UNDER ONE’S FEET).
Down:
2 Catching (NETTING) odd (= anagram indicator) intent (intent = NETTIN-) from Government (-G) (NETTING),
3 Whipped up (made), served up (= reverse indicator) (made = EDAM) and eaten by someone who loves cheese (EDAM),
4 Switch (switch OFF-) at Terminus (-END) (OFFEND) or don’t get on at all (OFFEND),
5 Take turn out of laundrette (take ‘turn’ out of ‘laundrette’ = ladeete = ELATED) walking on air? (ELATED),
6 Recall (= reverse indicator) relative (son = NOS-) close to aunty (close/end to ‘auntY’ = -Y) (NOSY) as overly curious (NOSY),
7 State (= homophone indicator) spy (‘see’ = ‘see’ = SEA-) supplies (-FOOD) (SEAFOOD) those who used to go swimming (SEAFOOD),
8 Where to find source of irritation (UNDER ONE’S SKIN) personally beneath the largest organ (the largest organ is the skin = UNDER ONE’S SKIN),
9 A foreign (‘a’ foreign = UN-) revolutionary (red) raised (= reverse indicator) (red = -DER-) by one getting things done (-ACHIEVER) (UNDERACHIEVER) is not likely to reach potential (UNDERACHIEVER),
14 Holds the waste material (DUSTBIN) – mostly dead skin (DUST-) – and that’s the writer’s point (nib), in retrospect (= reverse indicator) (nib = -BIN) (DUSTBIN),
16 Put one’s name down (ENROL) to confuse (= anagram indicator) loner (loner = ENROL),
18 It’s overdone (BURNT) by reactionary (= reverse indicator) Polish (rub = BUR-) novelist on the fringes (‘NovelisT’ on the fringes = -NT) (BURNT),
20 Radon (gas) rising (= reverse indicator) (gas = SAG) from sink? (sink/dip = SAG),
21 Every second character turning up (= reverse indicator) in Memento (every second character is ‘mEmEnTo’ = eet = TEE) is a shirty type (TEE shirt),
24 Troublemaker (GREMLIN) in government (G-) lifts lid on (k) Russian government in the traditional sense (‘Kremlin’ without ‘k’ = -REMLIN) (GREMLIN),
26 Not farmed out (IN-HOUSE) by heinous (heinous) criminal (= anagram indicator) (heinous = IN-HOUSE),
27 Old foreign market (RIALTO is the old mercantile quarter of Venice) in Dublin? (RIALTO),
28 Turns up (= reverse indicator), key (music key -E) address (IP address = -PI-) that’s inarticulate (dumb) for the most part (b) (‘dumb’ without ‘b’ = dum = MUD) (MUD PIE) goes down sweet in Mississippi (Mississippi MUD PIE),
32 Bank’s lightning strike (banks ‘LIghtning striKE’ = LIKE), for example (LIKE),
33 Served up (= reverse indicator) in coffee bars (in ‘cofFEE Bars’ = feeb = BEEF) or that’s the local criticism (BEEF).