Across:
8 No art in satirical (no “art” in “satirical” = siical = SILICA) piece coming from The Stones perhaps (SILICA),
9 Decent (PROPER-) half of the city (half of the ‘city’ = -TY) (PROPERTY) to live in (PROPERTY),
10 Helicopters dropping off richest (‘helicopters’ dropping off ‘richest’ = lope = POLE) staff (staff/stick = POLE),
11 Support (BACK-) on Lansdowne Road (-GROUND) (BACKGROUND) is in one’s DNA (BACKGROUND),
12 Who had (who had = HOWDAH) problem (= anagram indicator) with room on back of Jumbo? (seat for riding on an elephant = HOWDAH),
14 Express dissatisfaction (COMPLAIN) with Otis being taking off compilations (‘Otis’ being taking off ‘compilations’ = cmplaion = COMPLAIN),
15 It’s a job for the journalist (GOSSIP COLUMNIST) to chew the fat (GOSSIP) with pre-eminent (first = 1ST = -IST) prop (COLUMN-) from the start (= positional indicator) (GOSSIP COLUMNIST)),
18 Opening that (opening ‘that’ = T-) paper (-SUN-) for nice friends (Nice/French ‘friends’ = ‘amis’ = -AMIS) (TSUNAMIS) causes waves of disturbances (TSUNAMIS),
20 Novice (learner = L-) edits (edits = -ISTED) novel (= anagram indicator) (LISTED) on the stock exchange? (LISTED on the stock exchange),
22 One of the best singers to have talked (SUPERGRASS) presumably about the hallowed turf of Croke Park (SUPER GRASS),
24 Revolutions (LAPS) upsetting (= reversal indicator) Bath, for instance (Bath, England = Roman Spa = -APS), and Limerick (L-) (LAPS),
25 What that murderous lot in The Palace did (REGICIDE) about (RE-) soldier (-GI-) not finishing (r) drink (‘cider’ without ‘r’ = -CIDE) (REGICIDE),
26 Determined attempt (EFFORT) to initially entice (initially ‘entice’ = E-) force (-F) to go to old army stronghold (-FORT) (EFFORT).
Down:
1 Order (-O-) in mink (mink = KIM-N-) dress (= anagram indicator) with order (-O) (KIMONO) for robe (KIMONO),
2 Refer to (CITE) bit of Medici testament (bit of ‘Medici testament’ = CITE),
3 Most of those in 14 down (most of ‘chops’ = CHOP) following (= positional indicator) one of Mary’s followers (LAMB = from “Mary had a Little Lamb”) (LAMB CHOP) from the butchers (LAMB CHOP),
4 Large scale (EPIC) concealment of vine pickings (concealment of ‘vine pickings’ = EPIC),
5 Bumper (DODGEM) duck (DODGE-) starter for meal (starter for ‘meal’ = -M) (DODGEM),
6 Relapse on a (relapse on a = AEROPLANES) train (= anagram indicator) – despite the ups and downs, presumably flying now! (AEROPLANES),
7 Stanley (STAN-) and Diana (-D-I-) join school (National School = -NS) (STAND-INS) working as substitute teachers (STAND-INS),
13 Detective’s (DIs = DIS-) in (-IN-) with that woman (-HER-) from IT (-IT) (DISINHERIT) – give her nothing (DISINHERIT),
14 Split’s (splits = CHOPS) college (C-) dances (-HOPS) (CHOPS),
16 Hides (OBSCURES) half of Jacob’s (half of ‘Jacobs’ = OBS-) smokes (-CURES) (OBSCURES),
17 Insulted (insulted = UNLISTED) cast (= anagram indicator) off the record (UNLISTED),
19 Thieving bird (MAGPIE) of copper (-P-) consumed by wise guys (Magi = MAG-I-) from Spain (-E) (MAGPIE),
21 Party abandons property tax (‘party’ abandons ‘property tax’ = ropetx = EXPORT) for those consumers living aboard (EXPORT),
23 Rig leaves Algiers (‘rig’ leaves ‘Algiers’ = ales = ALES) destined for the public houses (ALES),
24 Some prominent follower (some ‘prominent follower’ = tfol) = LOFT) upset (= reversal indicator) (tfol = LOFT) by one of those over the stable (LOFT).