Solving time, 17 mins
* = anagram < = reversed
ACROSS
8 CHAT EAU (water in French)
9 A (GAIN) ST ST = saint = good person
10 O N ICE
11 DISFAVOUR (Avoid furs)*
12 D (AVID L) EAN
14 BOO BY
15 DEEP SET
17 MARR (I) ED
19 DIN ER
20 RENDITION (trio in den)*
22 COMPO SURE
23 MAD AM
25 DI (STI) CH It’s<
26 LINE-OUT cf outline
DOWN
1 AC CORDED
2 MALI Hidden
3 DEF END DEF successive in alphabet
4 MUDDLES THRO UGH (the doldrums)*
5 SA (It = sex appeal) LAD BAR Rab< Rab Butler, politician from 1950s etc
6 AN (NO D) O MINI
7 ST (H)(URD) Y Douglas ‘Urd
9 ABSENT-MINDEDLY (any Lib-Dem tends)*
13 VI (ET (and = with in French) NAMES) E
16 (t)SAR DON I C
18 DYNAMITE “Dinah might”
19 DE (CID) E police in the river
21 I’M M (UN) E
24 DO (f) OR