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A bit harder than some by Quixote, solving time 35 mins.
* = anagram < = reversed
ACROSS
1 BAR (MA)N
4 FU (SIN)G
8 ANTICOAGULANTS (a nostalgic aunt)*
10 G E (HE)NNA Anne<
11 MA (SHIN)G
12 BAT Hampshire Bath is in Somerset
13 MAIN COURSE (a sour mince)*
15 SACRAMENTO (moaners act)*
17 Kate MOS(e)S
20 M (ANT) E AU
21 MARTENS smarten – first (letter) to last
23 SOCIAL (party) CLIMBING (plant ie creeper) &lit
24 E (ROT I)C
25 PA TENT
DOWN
1 B (H) ANG H = hospital bang = suddenly
2 RATCHET (chatter)* nice double use of ‘teeth’
3 A Setter CENT
4 FOUR-MINUTE MILE (mum routine life)*
5 SNAPS HOT
6 NUT TIER
7 BANANA REPUBLIC u (university) in (Caribbean plan)*
9 A G REES (Welsh name)
12 BOS (OM)S
14 FACE-LIFT ie face being ‘lifted’ (going upwards) in the clue in onE CAFe, ‘to the north’ signalling that
16 CON TOUR
18 ONE-TIME “won” and ‘time is the enemy’
19 CRIME A
22 S (l)IGHT