Across:
1 Instructions for cooking (RECIPE) price- (price) -fixing (= anagram indicator) (price = RECIP-) for energy (-E) (RECIPE).
4 Reprimanded local (CARPETED) runner (CARPET-) for taking drugs (ecstasy = -E-) to succeed in the end (‘succeeD’ in the end/ last letter = -D) (CARPETED),
9 Writer (PENCIL) gets stick for putting things down (PENCIL),
10 Barman (Senior Counsel = SC-) or (-OR-) detective (-PI-) gets to switch (switch -ON) (SCORPION) something with a sting in its tail (SCORPION),
12 A follower (‘a’ follower is B-) gets well blotto locally (well -OILED) with Noah’s son (HAM) (BOILED HAM) – a meaty type (BOILED HAM),
13 Look for damages (-SUE) after (= positional indicator) minor relative (sister = sis) loses the head (s) (‘sis’ without ‘s’ = IS-) (ISSUE) with the heirs (ISSUE),
14 Miserable (INCONSOLABLE) in (IN-) Cabinet (console = -CONSO-LE) over where to keep the scientists (-LAB-) (INCONSOLABLE),
18 Has a job examining relative’s (FAMILY DOCTOR) bloodline (FAMILY) for Spike (spike/tamper = DOCTOR) (FAMILY DOCTOR),
21 Tested partner (TRIED and tested), terrified, putting out fire (‘terrified’ putting out/without ‘fire’ = terid = TRIED),
22 Ranges (GAS STOVES) of swimming (= anagram indicator) togs, vases? (togs vases = GAS STOVES),
24 New pupil (INITIATE) of Titian (Titian) working (= anagram indicator) (Titian = -NITIAT-) in Ireland (Ireland domain = .ie = I-E) (INITIATE),
25 Comical side (HUMOUR) seems missing from summerhouse (‘seems’ missing from ‘summerhouse’ = umhou = HUMOUR),
26 They rack their brains (THINKERS) for the names of philosophers (THINKERS),
27 Is left (is left) out (= anagram indicator) (is left = STIFLE) of hamper? (hamper/hinder = STIFLE).
Down:
1 State (REPUBLIC) of watering hole (-PUB-) in antiquity (relic = RE-LIC) (REPUBLIC),
2 Reassure (CONVINCE) Sting (CON-) and One Direction (North = -N-) guarded by police department (vice department = -VI-CE) (CONVINCE),
3 Cats from pit scared (‘cats’ from ‘pit scared’ = pired = PRIDE) by a group of ferocious animals (PRIDE),
5 A (A-) firm (-COMPANY-) is (-IS-) in court (ct = -C-T) (ACCOMPANYIST) charged with providing backing for the band (ACCOMPANYIST),
6 Quite fond of (PARTIAL TO) tailor – Pat (tailor Pat) Rock (= anagram indicator)! (tailor Pat = PARTIAL TO),
7 Globe falls off strobe light? (‘globe’ falls of ‘strobe light’ = striht = THIRST) You’ll have to go to the bar to sort out that problem! (THIRST),
8 Boss in a criminal organisation (DON-) opening doors (-KEY) (DONKEY) for the mule (DONKEY),
11 Is this what the director is expecting to do (SHOOTING STAR) travelling light? (SHOOTING STAR),
15 Shipshape (NEAT) on the water (DRINK) (NEAT DRINK) in a port with no rocks presumably? (port/drink with no rocks/ice = NEAT DRINK),
16 Keep back (STAVE OFF) from street (ST-) and avenue (-AVE) and get away (OFF) (STAVE OFF),
17 Maintain (PRESERVE) park (P-) for one of those on The Bench (extra player/sub on bench = -RESERVE) (PRESERVE),
19 Most (t) of the illusion (trick) (‘trick’ without ‘k’ = -TRIC-) embraced by Stone (St = S-T) (STRICT) is of a harsh regime (STRICT),
20 Don to take a dip (don/put on BIKINI to take a dip/swim) in top beach (top ‘Beach’ = B-) near Island (-I-) Family (-KIN-) Holiday Centre (‘holIday’ centre = -I) (BIKINI),
23 Mock (TAUNT) Tudor front (‘Tudor’ front = T-) associated with relative (-AUNT) (TAUNT).