Lark averse to cold? (5)
I believe the answer is:
antic
'lark' is the definition.
(thesaurus)
'averse to cold?' is the wordplay.
'averse to' becomes 'anti'.
'cold?' becomes 'c' (eg on taps).
'anti'+'c'='ANTIC'
(Other definitions for antic that I've seen before include "Eccentric once" , "Caper; grotesque (arch.)" , "Old clown" , "Absurd action" , "Frolic" .)