Across:
8 Where one may paint a picture (STUDIO) of where someone is living (STUDIO),
9 Taken off guard (STARTLED) by most of (a) the Greek letter (‘Delta’ without ‘a’ = delt = TLED-) from informers (rats = STAR-) all going back on word (= reverse all indicator) (STARTLED),
10 Some catastrophe repeated (some ‘catastrophe repeated’ = HERE) and repeated in The British Commons (HERE here),
11 It’s my pleasure (PRIVILEGED) to deliver pig (deliver pig = PRIVILEGED) chops (= anagram indicator),
12 Top secret? Missing cop (‘top secret’ missing ‘cop’ = tseret = STREET) found at the side of the path! (STREET),
14 Unable to tear myself away (IMMOBILE), as I’m (IM-) on the phone (-MOBILE phone) (IMMOBILE),
15 Charged (ELECTRIC) for empty (BLANK-) net (net) with top missing (n) (‘net’ without ‘n’ = -ET) (ELECTRIC BLANKET) – that’s bound to put the heat on someone undercover (ELECTRIC BLANKET),
18 A (A-) hairdresser finally (‘hairdresser’ finally = -R-) in dishevelled (= anagram indicator) salon (Salon = -LSO-AN-) for skinheads (-S) (ALSO-RANS) and, by a long shot, the losers (ALSO-RANS),
20 Send on a wild goose chase (MISLED) with silly (= anagram indicator) smile (smile = MISLE-) from director (-D) (MISLED),
22 Repudiation (DISCLAIMER) of record (DISC-) left (-L-) on purpose (-AIM-) by engineering (-E-) head of research (head of ‘research’ = -R) (DISCLAIMER),
24 Ends war (PACT) amidst group activism (amidst ‘group activism’ = PACT),
25 If this is not done, the teachers will be annoyed (HOMEWORK) with The House (HOME-) and Labour (-WORK) (HOMEWORK),
26 Posers would say (CHEESE) cheerleaders empty larder (“cheerleaders” empty “larder” = cheees = CHEESE).
Down:
1 Confirm (ATTEST) a (A-) bone (-T- bone) analysis (-TEST) (ATTEST),
2 One (I-) starts damage limitation exercises (starts ‘damage limitation exercises’ = -DLE) (IDLE) when one has nothing better to do (IDLE),
3 Come (COM-E) across place (-PUT-) for right (-R) (COMPUTER) terminal (COMPUTER),
4 Drunk in Italy (ASTI) concealed by Douglas Timothy (concealed by ‘Douglas Timothy’= ASTI),
5 Slag off gradualism (‘slag’ off ‘gradualism’ = raduim = RADIUM) by dangerous element (RADIUM),
6 Lift (“steal” = “STEEL”) report (= homophone indicator) by bishop (B-) and (-AND-) priests at the foundation (‘priests’ at the foundation = -S) (STEEL BANDS) with carnival percussionists (STEEL BANDS),
7 What people privately get up to (REVEILLE = army signal to wake up) is a wake-up call for those working for a major employer (a ‘major’ employer = army / REVEILLE wake-up call),
13 Each censor (each censor = ENCROACHES) sadly (= anagram indicator) treads on someone’s toes (ENCROACHES),
14 One (I-) new (-N-) mediating service for sporty types (Court of Arbitration for Sport = -CAS) (INCAS) of old people (INCAS),
16 Lounge (lounge/laze = LOLL-) has one (-I-) soft drink (-POP) (LOLLIPOP) for local sucker (LOLLIPOP),
17 Fruit (LIME-) stack (-RICK) (LIMERICK) in Munster (LIMERICK),
19 River (AMAZON) in Oman (Oman = AM-ON) travelling (= anagram indicator) around a (-A-) zone (-Z-) (AMAZON),
21 Let off (EXCUSE) for Passover? (pass over = EXCUSE),
23 Build (MAKE) goes around man-made lake (goes around ‘man-made lake’ = MAKE),
24 Linesman (POET) is responsible for 17 down (POET responsible for ‘Limerick’).