Across:
1 Keep making alterations (CHOP AND CHANGE) to church (CH-) by a pond (a pond) preparing (= anagram indicator) (a pond = -OP AND) convert (CHANGE) (CHOP AND CHANGE),
10 Accommodating (HOUSING) most of (p) the dance (‘hop’ without ‘p’ = HO-) on drugs (-USING) (HOUSING),
11 Swimming (= anagram indicator) in baths (in baths = ABSINTH) or holding this at the bar perhaps (ABSINTH),
12 The essence (essence/heart = PITH) of what’s locked up in decrepit household (what’s locked up in ‘decrePIT Household = PITH),
13 Off target (WIDE-) for point (North = -N) (WIDEN) – put on Lane! (put on lane on a road = WIDEN),
15 A feature of all sides today (CHOP on all sides of today’s grid) in Split (split = CHOP),
17 Couldn’t get rid of cold (‘couldnt’ get rid of ‘cold’ = unt = NUT) in Brazil (NUT),
19 Denied (denied) out of hand? (= anagram indicator) (denied = INDEED) Really! (INDEED)
21 Students of the past (ALUMNI) in old boys’ club (ALUMNI),
22 Supplies the drugs (SYRINGE) for wedding band (-RING-) taken in by groom? (= anagram indicator) Yes! (Yes = SY-E) (SYRINGE),
23 At opening of Oresteia (at opening of ‘Oresteia’ = -O-) in Gate (G-ATE-), the final scene (final ‘scenE’ = -E) (GOATEE) is pointedly hairy (GOATEE),
25 Might annoy (MAY BUG) one of those Cockchafer pests? (MAY BUG),
27 Shady type (HUE) of hot sauce without tacos (‘hot sauce’ without ‘tacos’ = hue = HUE),
29 Bookseller releases Rebels (‘bookseller’ releases ‘rebels’ = ookl = LOOK) by spy (LOOK),
30 Sudden increase (BULGE) in croaks from Black Grouse (‘croaks’ from ‘Black Grouse’ = blgue = BULGE),
31 Hypnotist dismisses hints (‘hypnotist’ dismisses ‘hints’ = ypot = TYPO) as a mistake in The Paper (TYPO),
34 Firm (company = CO-) popular (-IN-) with twenty-somethings, for instance (-AGE) (COINAGE), in the capital (capital/money = COINAGE),
35 Unclear (unclear) play (= anagram indicator) (unclear = NUCLEAR) relates to a type of energetic family? (NUCLEAR family),
36 Hack (CHOP-) gets stick (stick/attach = -PIN-) at the start of gig (start of ‘Gig’ = -G) from Bowie (Bowie KNIFE) (CHOPPING KNIFE) and one of The Blades (CHOPPING KNIFE).
Down:
2 Went looking to see the game (H-UNTED) around area (-A-) (HAUNTED) filled with spirits (HAUNTED),
3 Characters in EPA interested (characters in ‘ePA INterested’ = PAIN) in result of the injury (PAIN),
4 Going (going = NOGGI-) crazy (= anagram indicator) with new (-N) (NOGGIN) measure of drink (NOGGIN),
5 Lodge (CHALET) in church (CH-) academy (-A-) has rented accommodation (-LET) (CHALET),
6 It’s an oversight (lapse) not opening (l) (‘lapse’ without ‘l’ = APSE) part of the church (APSE),
7 Drink (GIN-) with actor (-HAM actor) after (= positional indicator) grand (-G-) (GINGHAM) colourful spread (GINGHAM),
8 Grandfather (grandfather clock = C-LOCK) admits jumping (-HOPPING) to front business (front ‘Business’ = B-) (CHOPPING BLOCK) – the one the butcher had to make cuts on (CHOPPING BLOCK),
9 Getting rid of the directors presumably (CHOPPING BOARD) producing the wooden type in The Restaurant (CHOPPING BOARD),
14 Some French (French ‘some’ = DU-) revolutionary (= reversal indicator) in good shape (fit = -TIF-) at university (University of Limerick = -UL) (DUTIFUL) is responsible (DUTIFUL),
16 Adjust figures (RESET) for fallen (= anagram indicator) trees (trees = RESET),
18 Lima (-L-) taken in by Bill (bill/beak = B-EAK) (BLEAK) Stark (BLEAK),
20 Laid eyes on missing sea lion (‘laid eyes on’ missing ‘sea lion’ = dey = DYE) – the one that can change colour (DYE),
21 Yearly get-together (AGM) in uplifting (= reversal indicator) Bloom Gardens (in ‘blooM GArdens’ = mga = AGM),
24 Get rid of (ABOLISH) Basil (Basil = AB-LIS-) Faulty (= anagram indicator) over Oxford (-O-) Hotel (-H) (ABOLISH),
26 Horse (BAY) on a grassy field (LEA-) is initially fed (initially ‘Fed’ = -F) (BAY LEAF) something Laurel dropped (BAY LEAF),
27 The bones (HUMERI) of fruit machine missing in fact (‘fruit machine’ missing ‘in fact’ = ruimhe = HUMERI),
28 Get going without it (‘get going’ without ‘it’ = gegong = EGGNOG) for Christmas drink (EGGNOG),
32 A pitch (CAMP) for Coldplay to open (‘Coldplay’ to open = C-) Band Aid (-AMP) (CAMP),
33 Have a quick look at (SCAN) couples supporting school plan (couples supporting ‘SChool plAN’ = SCAN).