Across:
1 A (A-) time to rest (-SLEEP) (ASLEEP) or go out for the night? (ASLEEP),
4 Sophisticated (ADVANCED) Count (add = AD-D) in possession of vehicle (-VAN-) going to Clare (-CE) (ADVANCED),
9 Macedonia is out of sodium carbonate (‘Macedonia’ is out of ‘sodium carbonate’ = surbot = ROBUST) and that’s tough (ROBUST),
10 Proof of the fire (ASH-) picked up by consumers in the cafeteria (-TRAYS) (ASHTRAYS) containing the last of the Cubans (ASHTRAYS hold the residues of Cubans/cigars),
12 Puzzled (PERPLEX-) by writer (-ED) (PERPLEXED) at sea (PERPLEXED),
13 Some backward (= reverse indicator) cyborg gangsters (some ‘cybORG GAngsters’ = orgga = AGGRO) in trouble locally (AGGRO),
14 Leaves (-PARTS) behind (= position indicator) the bar (COUNTER-) (COUNTERPARTS) for peers (COUNTERPARTS),
18 Get the wrong end of the stick (MISINTERPRET) from short (s) address? (Miss) (“miss” without “s” = MIS-) Explain how that came about! (-INTERPRET) (MISINTERPRET),
21 Show appreciation (THANK) for Chamber (tank = T-ANK) welcoming heroine (-H-) (THANK),
22 They make an impression (ENGRAVERS) by putting Rontgen (-R-) into unstable (= anagram indicator) nerve gas (nerve gas = ENG-AVERS) (ENGRAVERS),
24 Turning (ROTATION) off (= anagram indicator) oration? (oration = ROTA-ION) About time! (-T-) (ROTATION),
25 Turns up (= reverse indicator) Rafa’s (rafas = SAFAR-) initial insight (initial ‘Insight’ = -I) (SAFARI) is attractive to holidaymakers following game (SAFARI),
26 Position batsman takes perhaps (cricket batsman facing bowler is “on strike” = ON STRIKE) is not working (ON STRIKE),
27 Wrong (= anagram indicator) dosage (dosage = SEA DOG) of antiquated salt (old ‘salt’ = experienced sailor = SEA DOG).
Down:
1 Opening for The Aviator (AIRSPACE) – broadcasts (AIRS-) from March (march = -PACE) (AIRSPACE),
2 Party (Labour) ignores leader of the opposition (o) (‘Labour’ without ‘o’ = LABUR-) from clip (b) lacking sensitivity (‘numb’ without ‘b’ = -NUM) (LABURNUM) in the plant (LABURNUM),
3 Lee’s a (lees a) rebel (= anagram indicator) (lees a = EASEL) to one of those set-up by 6 down (EASEL set up by ‘art master’),
5 Draw Back (drawback = DISADVANTAGE) for detective’s (DI’s = DIS-) benefit (-ADVANTAGE) (DISADVANTAGE),
6 A (A-) retweet (-RT) about (= reverse indicator) Sam (Sam = MAS-), Lawrence (-TE- Lawrence) and Regina (-R) (ART MASTER) getting students to draw a veil over something perhaps (ART MASTER),
7 Shed tears (cry = CR-Y) over a (-A-) horse (-GG-) (CRAGGY) – the rocky weather-beaten type (CRAGGY),
8 Posted (posted) all over the place (= anagram indicator) (posted = DESPOT) by Stalin (DESPOT),
11 Classy record (EXERCISE BOOK) of what one studied when working out (EXERCISE BOOK),
15 Slight strains (-RICKS-) in race? (Tourist Trophy race = T-T-) Go to Casualty (-ER) (TRICKSTER) creating a racket! (TRICKSTER),
16 Type of drawing- (FREEHAND drawing) -room that’s not being used (FREE-) by worker (-HAND) (FREEHAND),
17 Putting away (STASHING) foreign (= anagram indicator) hat signs (hat signs = STASHING),
19 Reset (reset) switch (= anagram indicator) (reset = STERE-) for old (-O) (STEREO) music system (STEREO),
20 Goes around (= reverse indicator) filming locale (set = TAS) with perched (sat = TES-) (TASTES) swallows (TASTES),
23 Characters in St Tropez – a majority (characters in ‘st tropEZ – A MAjority = ezama) retiring (= reverse indicator) (ezama = AMAZE) in shock (AMAZE).