1: Venomous enemy lurks in Caspians (3)
2: Reportedly remained sober (5)
3: Field worker finding insect on vegetables (7)
4: Cover-up file conceals, ultimately, wrongdoing by one female (3,4)
5: Vegetable has red cap (5)
6: Confederate poet returned with rather less sparkle (7)
7: Spread of disease nearly borne by horse (9)
8: Ever-practical, Mr. Vader keeps own little piggy (4-2-5)
11: Hang back, keeping right next to person buying a jumper (11)
14: Approached flapper losing one small part (5,4)
17: Blind doctor sees Ely (7)
19: Liqueur rumored to heal foot-and-mouth disease among pigs? (7)
21: Alternative part of course (5)
22: Kent, in part, reportedly has wheels (5)
25: 4-down Arias hit high note in some of the lungs (3,3)