1: Frost over mid-January during epic exploit (3,2)
2: Old Greek circle followed by Northern military group (7)
3: Like a big cat, snaky fish consumes Spanish toddler (7)
4: Artifical intelligence was at the heart of Kelly Street... Swapped for a blemish that can never be removed. (7)
5: Those with regrets reining in destroyers (7)
6: Exploding sausages? (7)
7: Nothing we have to pay (3)
8: Maintenance with Jones family perhaps (7,2)
12: Start reducing salt? (3)
13: Katrina limits Bill, a little jerk, blowing downhill (9)
16: Cull out from top ten (3)
17: Whip in swell company (7)
18: Little singer returned, following band to total a hairy little mother with seating for one. (7)
19: One who expurgates starting to dance in hat (7)
20: Get sun darkened between California, Iowa, and city in Italy (7)
21: Carries small cup and helps out (7)
23: Pan given back by pastry taster (5)
25: Beauty stripping top and bottom is an additional feature (3)