Singer finding warmth in clothing (8)
I believe the answer is:
wheatear
'singer' is the definition.
(wheatear is a kind of birdanimal)
'warmth in clothing' is the wordplay.
'warmth' becomes 'heat' ('heat' can be a synonym of 'warmth').
'in' indicates putting letters inside.
'clothing' becomes 'wear' ('wear' can be a synonym of 'clothing'**).
'heat' inserted within 'wear' is 'WHEATEAR'.
'finding' is the link.
(Other definitions for wheatear that I've seen before include "Songbird" , "Migrant's passion" , "singer" , "bird" .)