Across:
1 The beauty (APPEAL) of getting remuneration from European Parliament ('remuneration' from 'European Parliament' = epapla = APPEAL),
4 Martin’s racy partner (ASTON- Martin) is (-IS-) first on hand (first on ‘Hand’ = -H) (ASTONISH) to amaze (ASTONISH),
9 Relax the regulations (LOOSEN) for free (LOOSE-) association at the foundation (‘associatioN’ at the foundation = -N) (LOOSEN),
10 Find (find) out (= anagram indicator) (find = -NFID-) sweetheart (‘swEet’ heart = -E-) is taken in by hoax (cod = CO-D) (CONFIDED) and shared innermost thoughts (CONFIDED),
12 Officer (colonel = COL-) fired from the army (-CANNON) (COLCANNON) for feeding this to the locals (COLCANNON),
13 Sharp mountain ridge (ARÊTE) going around (= reverse indicator) bit of diverse Terai-Duar savanna (bit of ‘diversE TERAi duar savanna’ = etera = ARÊTE),
14 Insensitive perhaps (THICK-SKINNED) to local fool’s (THICK-S-) family (-KIN-) getting to study (den) review (= reversal indicator) (den = -NED) (THICK-SKINNED),
18 Switch (switch -ON-) to private practice (-COMBAT-) and (and) briefly (d) (‘and’ without ‘d’ -AN-) invest in good books (New Testament = N-T) (NON- COMBATANT) – not the uniform type (NON-COMBATANT),
21 Some upsetting (= reverse indicator) parliamentary (some upsetting ‘parLIAMEntary’ = liame = EMAIL) form of communication (EMAIL),
22 That can be avoided (AVERTABLE) with late brave (late brave) move (= anagram indicator) (late brave = AVERTABLE),
24 Pretend not to know (PLAY DUMB) borstal boy (Brendan Behan’s Borstal Boy = PLAY) born in the capital (Dub = DU-B) around beginning of May (beginning of ‘May’ = -M-) (PLAY DUMB),
25 Is about to join The Union (FIANCÉ) working (= anagram indicator) in café (in café = FIANCÉ),
26 In (in) saying (= homophone indicator) (‘in’ = ‘inn’ = HOSTELRY) that, should offer one a drink (HOSTELRY),
27 Manage (EKE OUT) Gene Kelly at The Centre (‘genE KElly’ at the centre = EKE)? That’s common knowledge! (OUT) (EKE OUT).
Down:
1 Serves up (= reverse indicator) Mexican food (taco = -OCAT-) collected by Ella (Ella = ALL-E) (ALLOCATE) to distribute (ALLOCATE),
2 State (PROCLAIM) of Oscar (-O-) and Charlie (-C-) interrupting April (April), Rocky (= anagram indicator) (April = PR-LAI-) and Mike (-M) (PROCLAIM),
3 Sporting venue (ARENA) for hydroplane racing (‘hydroplANE RAcing’ = anera) on the rise (= reverse indicator) (anera = ARENA),
5 Type of statement (SWORN) taken from opponents (ENEMIES) (SWORN ENEMIES) of those who swear to God they can’t stand others (SWORN ENEMIES),
6 Switch (OFF) a cream (a cream) pie (= anagram indicator) (OFF CAMERA) when no one’s looking (OFF CAMERA)
7 Denied (denied) out of hand? (= anagram indicator) (denied = INDEED) Really! (INDEED),
8 Put a border around (HEDGED) pansies out of pig-headedness (‘pansies’ out of ‘pig-headedness’ = gheded = HEDGED),
11 Gets legless types moving to music (SNAKE CHARMER) with type of milk (Milk SNAKE) smoothie? (CHARMER) (SNAKE CHARMER),
15 No (no) State (= homophone indicator) (‘no’ = ‘know’ = KNOW-) gets incomplete (r) collection of financial figures (‘ledger’ without ‘r’ = -LEDGE) (KNOWLEDGE) – that’s all in your head! (KNOWLEDGE),
16 Over (= reverse indicator) in Australia (Oz = -ZO) get your hands on (nab = -BAN-) piece of cloth (rag = GAR-) (GARBANZO) that’s used for making hummus (chickpea = GARBANZO),
17 Most expensive (STEEPEST) car gets away from pacesetters (‘car’ getting away from ‘pacesetters’ = pesettes = STEEPEST),
19 Prometheus dismissed sour (‘Prometheus’ dismissed ‘sour’ = pmethe = TEMPEH) dish made with fermented soya (TEMPEH),
20 They don’t believe (PAGANS) in those in Druid’s company? (PAGANS),
23 Opening 14 across (opening ‘think-skinned’ = THICK) is not bright (THICK).