Across:
8 Condition (HEALTH) of Moor (moor = HEA-TH) going around lost (-L-) (HEALTH),
9 Holiday (break) report (= homophone indicator) (‘break’ = ‘brake’ = BRAKE) by the writer (PAD) (BRAKE PAD) will help one to slow down (BRAKE PAD),
10 Underhand type (PALM) of participating Stockholm banks (‘PArticipating StockhoLM’ banks = PALM),
11 Refuse to move from here (refuse/rubbish in WHEELIE BIN), as it sounds like fun (whee! = WHEE-) to tell stories (-LIE) to caddy (BIN) (WHEELIE BIN),
12 Malthusian didn’t get this (‘Malthusian’ didn’t get this/ without ‘this’ = maluan = ALUMNA) from female graduate (ALUMNA),
14 Make a big effort (BUST A GUT) to completely get the joke (BUST A GUT),
15 One Direction (NORTH-) join one of The Eagles (erne) briefly (e) (‘erne’ without ‘e’ = -ERN) in Europe (IRELAND) (NORTHERN IRELAND) for version of Alternative Ulster perhaps (NORTHERN IRELAND),
18 Poser (CLUE-) from takeaway (take away = -LESS) (CLUELESS) has no idea (CLUELESS),
20 Part of the diagnosis terrified (part of the ‘diagnoSIS TERrified’ = SISTER) medical practitioner (nurse / SISTER),
22 Bringing someone around (PERSUADING) to sway (persuade) Trim (e) (‘persuade’ without ‘e’ = PERSUAD-) is popular (-IN-) with Government (-G) (PERSUADING),
24 Run one’s eyes over (look) report (= homophone indicator) (‘look’ = ‘LUCK’) into what’s prevalent in the betting industry (LUCK),
25 The most immaculate (CLEANEST) castle (C-) on meadow (-LEA-) with tree house (-NEST) (CLEANEST),
26 The oldest member (ELDEST) of unsettled (= anagram indicator) Leeds (Leeds = EDLES-) first team (first ‘Team’ = -T) (EDLEST).
Down:
1 It’s a small part of the bigger picture (DETAIL) with outfit on patrol (DETAIL),
2 The missing part of Hamlet’s (‘the’ missing part of/missing from ‘Hamlets’ = amls = SLAM) putdown? (SLAM down),
3 That man (-HE) consumed by potential (= anagram indicator) wealth (wealth = T- WHALE) (THE WHALE) in Moby Dick? (THE WHALE),
4 Finishes studio job too late (finishes ‘studiO joB toO latE’ = OBOE) for musician to play (OBOE),
5 Buzz (CALL-) from America (-US) (CALLUS) is a thick-skinned sort (CALLUS),
6 Spud’s (spuds = VEGETABLES) volume (V-), for example (e.g. = -EG-), with Beatles (Beatles) melody (= anagram indicator) (Beatles = -ETABLES) (VEGETABLES),
7 Isn’t saying much (TACITURN), as Adam (first = -I-) is consumed by diplomacy (tact = TAC-T-) covering The Ashes (-URN) (TACITURN),
13 They could be significant (significant -OTHERS) for director (-D) in May (M- -AY) (MOTHER’S DAY) – the one honouring The Mummy (MOTHER’S DAY),
14 Bars (bans) report (= homophone indicator) (‘bans’ = ‘BANNS’) produced by those organising the match (marriage BANNS / notice),
16 Rocky (= anagram indicator) Lowell is (Lowell is = OIL WELLS) tapping into natural energy (OIL WELLS),
17 Gave up on (RESIGNED) dress (= anagram indicator) designer (designer = RESIGNED),
19 Rubber (ERASER) taint from tea strainer? (‘taint’ from ‘tea strainer’ = esraer = ERASER),
21 Charlie (-C-) follows (= position indicator) old partner (EX-) to work (-USE) (EXCUSE) with justification (EXCUSE),
23 Very small amount (IOTA) amidst audiotapes (amidst ‘audIOTApes’ = IOTA),
24 Works in the stable (stable LAD-) and yard (-Y) (LADY) with tramp’s companion (LADY and the tramp).