1: Physicist failed to finish food before a trip round sun (7)
4: Treated badly, lost skin covering back (7)
8: Sinatra improved, becoming a master of his craft (7)
9: Jumps all over bees swarming rat (7)
10: Guard enthralled by desperately urgent sad song (5)
11: Big problem for police: one kitten's crying in hunger (5,4)
13: Defusing timer incorrectly can lead to this! (13)
16: Ratty cavalier redressed in proper horseman's uniform. (7, 6)
17: Rita Mears breaks wind near a plane (9)
19: Part of stair is erect (5)
22: Something cold in Candice Bergen's makeup (7)
23: Big man in charge of berg victim (7)
24: Outrageous trio of Italians bursting in on divorcee and me (7)
25: One providing funds for last one in debt (7)