Across:
1 Warm spot (HEARTH) for Central (HEART-) Hotel (-H) (HEARTH),
4 Picked up (MASTERED) butcher’s (butchers = anagram indicator) red meats (red meats = MASTERED),
9 Wander off (-STRAY) following (= positional indicator) a (A-) (ASTRAY) wayward path (ASTRAY),
10 Of course, warnings from those doing driving (‘fore’ = warning on golf course = FORES-) test (-TRY) (FORESTRY) studying the layout of Barna Woods, for example (FORESTRY),
12 Developed (= anagram indicator) pure petal (pure petal = PERPETUAL) that’s everlasting (PERPETUAL),
13 No harm in nightmare (no ‘harm’ in ‘nightmare’ = nigte = TINGE) or that’s the slight suspicion (TINGE),
14 A fair amount of (half of) 18 across (‘masterstroke’ = MASTER-) from the bakery (-PIE-) with limitless (i) frozen desserts (‘ices’ without ‘i’ = -CES) (MASTERPIECES) could be works of art (MASTERPIECES),
18 A touch of genius (MASTERSTROKE) from Emperor (MASTER-) Butterfly, for one (butterfly STROKE) (MASTERSTROKE),
21 Relative (-MAM-) behind (= positional indicator) unionist (U-) institute (-I) (UMAMI) gets a taste of Japan (UMAMI),
22 Made it known (ANNOUNCED) nun (nun = -N-UN-) is mixed up (= anagram indicator) with deacon (deacon = AN-O-CED) (ANNOUNCED),
24 Pretends (PLAY-ACTS) to amuse oneself (PLAY-) and isn’t idle (-ACTS) (PLAY-ACTS),
25 Half of 14 across (half of ‘masterpieces’ = MASTER) working in classy surroundings (MASTER),
26 Second winner (second ‘winner’ = -I-) in lottery (lottery = TO-LETRY) embarrassed (= anagram indicator) (TOILETRY) by something cosmetic (TOILETRY),
27 Got the impression (SENSED) society (S-) needs (needs = -ENSED) changing (= anagram indicator) (SENSED).
Down:
1 Warm up (HEAT) on the bicycle (PUMP) (HEAT PUMP) – it’s bound to raise the temperature (HEAT PUMP),
2 What wine expert will do (taste) removing introduction (t) (‘taste’ without ‘t’ = ASTE-) – bet (-RISK) (ASTERISK) it goes at the bottom of a page as a footnote (ASTERISK),
3 Mistakenly (= anagram indicator) rated (rated = TRADE) by profession (TRADE),
5 Area (A) with a type of gold (FOOL’S gold) taken to task (task = ERRAND) (A FOOL’S ERRAND) for getting the newcomer to order the striped paint (A FOOL’S ERRAND),
6 Pick up the tab (TREAT-) for workers (-MEN-) the first to talk (the first to ‘talk’ = -T) (TREATMENT) in therapy (TREATMENT),
7 Plump type (ROTUND) loses rag in Grand Tour (loses ‘rag’ in ‘Grand Tour’ = ndtour = ROTUND),
8 Something for someone who won’t be patient at night (DAY BED) in the guest quarters (DAY BED),
11 The one pulling the strings (PUPPET-MASTER) in 19 down (‘puppet’ = PUPPET -) and 25 across (‘master’ = - MASTER) (PUPPET-MASTER),
15 Finish off (ERADICATE) a cider (a cider = ERADIC-) bottle (= anagram indicator) and put away (-ATE) (ERADICATE),
16 Refuses to deal with (BOYCOTTS) Toby Scot (Toby Scot = BOYCOTTS) drunk (= anagram indicator),
17 Made a bid (TENDERED) to do a job at the American bar (TEND-) for English (-E-) revolutionary (-RED) (TENDERED),
19 Punch (Punch from “Punch and Judy Show” = PUPPET) from boxer (PUP-) is a favourite (-PET) (PUPPET),
20 Women (W-) from Britain (-B-) in Asia (Asia = -ASA-I) mixing up (= anagram indicator) (WASABI) hot condiment (WASABI),
23 Country (USA-), for example (e.g. = -GE) (USAGE), brings up the matter of consumption (USAGE).