Across:
1 Little rest (NAP-) for the family (-KIN) (NAPKIN) tied up in The Ring (NAPKIN in ring),
4 Humpty Dumpty (EGGHEAD-) goes to school (-S) (EGGHEADS) with local clever people (EGGHEADS),
9 Realise (ATTAIN) a (A-) temperature (-T-) ain’t (aint = -TAIN) problematic (= anagram indicator) (ATTAIN),
10 Keeping one’s distance from this (AVOIDING) by a (A-) hole (-VOID-) in (-IN-) golf (-G) (AVOIDING),
12 A record of what happened in court perhaps (a record of what happened in tennis court = MATCH DATA) to contest (MATCH) numerous facts and figures (DATA) (MATCH DATA),
13 Tailor (ADAPT) with a (A-) type of accommodation (pad = -DAP-) up (= reversal indicator) on square (-T square) (ADAPT),
14 One of those in police station (SUPER-) has not been processed (-NATURAL) (SUPERNATURAL) – it’s a concern for those who think the spooks are involved (SUPERNATURAL),
18 Those old types from Kildare Street (MUSEUM PIECES in the National Museum of Ireland, Kildare Street) could be relics from the Dark Ages (MUSEUM PIECES),
21 Let out a warning (roared), losing the head (r) (‘roared’ without ‘r’ = OARED) and had a row (OARED),
22 Exceptional people (RARE BIRDS) in the glossy Ibises (‘glossy ibises’ are RARE BIRDS ... and could be glossy Ibis hotels),
24 When you lose energy (POWER CUT), expect blackouts with this (POWER CUT),
25 Heard (= homophone indicator) you (‘you’ = ‘u’ = U-) spilled (= anagram indicator) wine (wine = -NWI-E) over skinhead (head of ‘Skin’ = -S-) (UNWISE) with rash (rash/risky = UNWISE),
26 Play- (play = -LY PA-) -acting (= anagram indicator) surrounded by Cork’s (corks = LI- -DS) (LILY PADS) supporters of the frogs (LILY PADS),
27 A hat (BONNET) for non-inheritable declining hairline? (‘non-inheritable’ declining/without ‘hairline’ = nontbe = BONNET).
Down:
1 Is close (NEAR) to young woman (MISS) (NEAR MISS) – the one who didn’t quite have a hit (NEAR MISS),
2 Gives up (= reversal indicator) crown (top/tip = PIT) and quits (STOPS) (PIT STOPS) with those looking to recharge batteries perhaps off the racetracks (PIT STOPS),
3 That’s one in the eye (IRIS-) for hotel (-H) (IRISH) on the island of Ireland (IRISH),
5 State briefly (GIVE A SUMMARY) to provide (GIVE) area (A) suitable for seasonal (= ‘summery’ = ‘summary’ = SUMMARY) broadcast (= homophone indicator) (GIVE A SUMMARY),
6 Attract attention of CAB (HAIL A TAXI), as shower (HAIL shower) from America (A) prepare to take off (TAXI) (HAIL A TAXI),
7 Line managers dishing out greens (‘line managers’ dishing out ‘greens’ = limana = ANIMAL) with chicken (ANIMAL),
8 Three from high street’s (‘three’ from ‘high streets’ = ighsts = SIGHTS) tourist attractions (SIGHTS),
11 March (PARADE) at Croke Park (GROUND) (PARADE GROUND) is for The Gathering of the company men (PARADE GROUND),
15 This will bring The Tourists back to where it all started (ROUND TRIP) and it’s in The Ticket perhaps? (ROUND TRIP ticket),
16 Barman (senior counsel = SC-) or (-OR-) detective (-PI-) gets to switch (-ON) (SCORPION) something with a sting in its tail (SCORPION),
17 Going all the way back (= reversal indicator), Moor (moor/secure = tie = -E IT) from Spain (-E-) took relative (sis = -S I S-) to African summit (‘African’ summit = A-) (AS I SEE IT) for a personal opinion (AS I SEE IT),
19 Come (COM-E-) across patrol leader (‘Patrol’ leader = -P-) with large (-L) (COMPEL) force (COMPEL),
20 The foreign (le = -EL) ingredient used in beer production (wort = TROW-) raised (= homophone indicator) (TROWEL) in the hands of the gardener (TROWEL),
23 Remove salt from longboats (remove ‘salt’ from ‘longboats’ = ongbo = BONGO) in drums (BONGO drums).