Across:
8 Overlook (forgive = PARDON) short (t) role played (part) (‘part’ without ‘t’ = PAR-) in the mob (-DON) (PARDON),
9 Props (BALANCES) at the end of 15 across (end of ‘lost one’s balance’ = BALANCE-) for closing plays (closing ‘playS’ = -S) (BALANCES),
10 Individuals (ONES) from India, from Indonesia? (‘India’ from ‘Indonesia’ = ones = ONES),
11 Starts 15 across (starts ‘lost one’s balance’ = LOST) from seed (CAUSE-) on topsoil (top ‘Soil’ = -S) (LOST CAUSES) and has a word with St Anthony about them (LOST CAUSES),
12 A fair amount of (half of) mink (half of ‘MInk’= -MI-) in coat (coat) tailored (= anagram indicator) (coat = ATO-C) (ATOMIC) for an energetic type (ATOMIC),
14 The result of the impact of time on top (GREY HAIR) of the aging locks (GREY HAIR),
15 Slipped (LOST ONE’S BALANCE) by 24 across (‘lost’ = LOST) and 10 across (‘ones’ = ONES) with composure (BALANCE) (LOST ONE’S BALANCE),
18 Reports (ACCOUNTS) cons cut a (cons cut a) settlement (= anagram indicator) (cons cut a = ACCOUNTS),
20 Provides a reminder (CU-E) about Dublin (-D-) meeting Donegal (-DL-) (CUDDLE) in tight encounter that’s supposed to be friendly (CUDDLE),
22 Expressed regret (APOLOGISED) to a (A-) shirty type (-POLO-) drawing up (= reverse indicator) design (design) that’s not finished (n) (‘design’ without ‘n’ = desig = -GISED) (APOLOGISED),
24 Clueless (LOST) of bank’s low interest (banks ‘LOw intereST’ = LOST),
25 Current affairs footage (NEWSREEL) of eels, wren (eels wren = NEWSREEL), cuckoo (= anagram indicator) (eels wren = NEWSREEL),
26 Never (never) wrong (= anagram indicator) (never = NERVE-) going to school (-S) (NERVES) with butterflies (NERVES).
Down:
1 Digs up (= reverse indicator) most (n) of the lawn (most of the ‘lawn’ = law = WAL-) for crazy (-NUT) (WALNUT) source of oil (WALNUT),
2 No need for dead ends (no ‘need’ for ‘dead ends’ = adds = ADDS) or annexes (ADDS),
3 Lancing a (lancing a) boil (= anagram indicator) (lancing a = ANGLICAN) for one who has faith in another (ANGLICAN),
4 Rejects (= reversal indicator) some of the possibilities (some of the ‘ posSIBIlities’ = sibi = IBIS) for flighty type (IBIS),
5 Carbon (C-) from endless (n) growth on tree (lichen) (‘lichen’ without ‘n’ = -LICHÉ) (CLICHÉ) – the same old chestnut perhaps? (CLICHÉ),
6 There is no need to say any more (ENOUGH SAID), as plenty (ENOUGH) at school (S-) get help (-AID) (ENOUGH SAID),
7 Spies (C-IA) every light eggy restaurant starters (‘Every Light Eggy Restaurant’ starters = -ELER-) inside to go with cold (-C) (CELERIAC) vegetable (CELERIAC),
13 Still (MOTIONLESS) got nothing to raise at the meeting? (no motion = MOTIONLESS),
14 Those responsible for atmosphere (GASES) covered up partying as escapism (covered up ‘partyinG AS EScapism’ = GASES),
16 Suggests someone in the little boys’ room (OCCUPIED) has something on their mind (OCCUPIED),
17 Make a scene over (act = AC-T) a fair amount (half of) of those from city (half of those from ‘CITy’ = -CI-) getting to study (-DEN-) (ACCIDENT) The Crash (ACCIDENT),
19 Found fault with (NAGGED) college head (dean) retiring (= reversal indicator) (dean = NA-ED) over heartless (a) joke (‘gag’ without ‘a’= -GG-) (NAGGED),
21 Stood the test of time (LASTED) in steel band Ben left (‘steel band’ ‘Ben’ left/without ‘Ben’ = stelad = LASTED),
23 Market (SELL) what Belle Smith swallowed (what ‘beLLE Smith’ = lles) going all the way back (= reverse indicator) (lles = SELL),
24 Master (LORD) of setting it up (= reversal indicator) in hydrolysis (in ‘ hyDROLysis’ = drol = LORD).