Old woman, cold, finds coat (3)
I believe the answer is:
mac
'coat' is the definition.
(mac is a kind of coat)
'old woman cold' is the wordplay.
'old woman' becomes 'ma' (I've seen this in other clues**).
'cold' becomes 'c' (eg on taps).
'ma'+'c'='MAC'
'finds' is the link.
(Other definitions for mac that I've seen before include "A rainproof" , "Coat - computer" , "Raincoat (colloq.)" , "Waterproof coat (colloq.)" , "Overcoat" .)