I found this much harder than usual from Quixote, with some less familiar words, solving time, 29 mins.
* = anagram < = reversed
ACROSS
1 F (REE P) ORT peer<
5 BLISS Double definition
9 ULAN BATOR (anti-Labour)* less i Capital of Mongolia
10 HAMAL Hidden, an Eastern porter
11 SPECIAL (place is)*
12 NAN DINE
13 MICROCLIMATE (it commercial)*
17 ANCIEN REGIME 1 in (man in Greece)*
20 COVE RED
21 CO (Michael) CAINE
22 Lord NORTH
23 W (APE NT) AKE A region in the North – a hundred is another name for a region
24 CRO (U)P
25 PROSPEC beaT (coppers)*
DOWN
1 FOURSOME “for some”
2 E (VAN ESC) E middle of wEEk esc key on computer keyboard
3 PUBLIC OWNERSHIP Cryptic definition, though not the most cryptic ever
4 RATEL hidden a kind of badger, found in Africa and India
5 BEHIND THE SCENES (Nice NHS bedsheet)*
6 I AM BIC BIC is a kind of pen
7 SA(L)VER
8 FRONTMEN “Leaders in the military van?” Had some doubts about this, but van = front, military front ie on the front line, I think
14 LA (I’D DO) WN
15 MITIGATE (game It It)*
16 TE (NEM E) NT (E men)< it also works if E men is not reversed, but I guess Quixote did that to give a better surface reading
18 I CONIC
19 OVERDO “Maybe burn ham” Double definition, favourite clue punning on ‘ham’ = meat and overact
21 CA(m)PER Liked this one too “Someone under canvas, male out for a bit of fun?”
I always look forward to my Sunday morning tussle with The Don. I agree with nmsindy that it was tougher than usual, but all the better for it.