Across:
8 Posed (SAT) for most of (y) those overseas (“navy” without “y” = NAV) (SAT NAV) – it’s the talk of the town on TripAdvisor (SAT NAV),
9 Legend (“leg” end = G-) gets nothing from tennis (-LOVE-), from fight in the ring (fight in the boxing = -BOX) (GLOVEBOX) or from one of the handy types in golf (handy type in VW Golf car = GLOVEBOX),
10 Celebrity (FAME) extremes of Facetime (extremes of ‘Facetime’ = FAME),
11 Manages to get through (NEGOTIATES) what 22 across does for a living (what ‘negotiator’ does for a living = NEGOTIATES),
12 Turns over (= reversal indicator) a (-A) manuscript (MS = -SM-) with intent (aim = MIA-) (MIASMA) leading to a bad atmosphere, in a literary sense (MIASMA),
14 Watch (EYE-) golf (-G-) with young woman (-LASS) (EYEGLASS) – that’s some spectacle (EYEGLASS),
15 What 22 across might do (‘negotiator’ might NEGOTIATE A PEACE) to stop the fighting (NEGOTIATE A PEACE),
18 Hardly (hardly = H-ALDRY) wrong (= anagram indicator) doing the rounds of hospital ward (-ER-) (HERALDRY) investigating everything to do with the Knights (HERALDRY),
20 Criminal (= anagram indicator) despot (despot = POSTED) strung up on line (POSTED online),
22 You’d expect this type of person to get a rise (NEGOTIATOR) out of broker (NEGOTIATOR),
24 Put away (PACK) those in banks passing the buck (those in banks/sides “passing the buck” = PACK),
25 I’m teased (I’m teased = MEDIATES) miserably (= anagram indicator) by referees (MEDIATES),
26 Pick over (NIBBLE) point (compass point north = N-) to Bible- (Bible = -IBBLE) -bashing (= anagram indicator) (NIBBLE).
Down:
1 Knocked back (= reversal indicator) sample of Pinot Noir – a fashionable (sample of ‘Pinot Noir – a fashionable’ = irafas = SAFARI) type to be enjoyed with game outdoors (SAFARI),
2 A single time (ONCE) in prison cells (in ‘prison cells’ = ONCE),
3 School (S-) doctor (= anagram indicator) leaving (leaving = -VENGALI) (SVENGALI) with sinister controller (SVENGALI),
4 Enthusiastic (AGOG) to geographically ignore Caerphilly (‘geographically’ ignore ‘Caerphilly’ = goga = AGOG),
5 The nerve of local (‘the nerve’ locally/casually = ‘the BOTTLE’) bank (BOTTLE bank),
6 Flustered a (flustered a = DEFAULTERS) criminal (= anagram indicator) by flouting The Bills (DEFAULTERS),
7 Chopped up (= anagram indicator) conifers (conifers = FORENSIC) provides a kind of evidence (FORENSIC),
13 Small (S-) dance (-HOP-) opens with A Heart of Love, (opens with ‘A Heart of Love’ = -AHOL-) a fair amount of (half of) Chic (half of ‘Chic’ = -IC) (SHOPAHOLIC) and Big Spender (SHOPAHOLIC),
14 Recording (ENTRY) of soldier on guard (sentry) needs no introduction (s) (‘sentry’ without ‘s’ = ENTRY),
16 They interpret the writings (EXEGETES) of Harry (harry/annoy = vex) heading off (v) (‘vex’ without ‘v’ = EX-) with sweetheart (‘sweet’ heart = -E-) and figures out (figures out = gets = GET-S) around Spain (-E-) (EXEGETES),
17 Rough (= anagram indicator) partisan (partisan = ASPIRANT) has ambitions (ASPIRANT),
19 Gets side-tracked (DRIFTS) by Poles coming off field sports (“Poles” coming off “field sports” = fidsrt = DRIFTS),
21 Stands out (EXCELS) of former (EX-) prisoner’s unit (cell) that’s not finished (l) (‘cell’ without ‘l’ = -CEL-) on some summit (‘some’ summit = -S) (EXCELS),
23 Water-ski dropping the wire? (‘water-ski’ dropping the ‘wire’ = atsk = TASK) That’s the thing to do! (TASK),
24 Sobers up without Rose (‘sobers up’ without ‘Rose’ = bsup = PUBS) in a number of bars (PUBS).