The woman gets warm in cover (7)
I believe the answer is:
sheathe
'cover' is the definition.
(to sheathe something is to cover it)
'the woman gets warm' is the wordplay.
'the woman' becomes 'she' ('she' refers to a woman).
'gets' is an insertion indicator (gets can mean captures or absorbs).
'warm' becomes 'heat'.
'she' placed around 'heat' is 'SHEATHE'.
'in' is the link.
(Other definitions for sheathe that I've seen before include "Protective cover, for sword say" , "Put away (a sword)" , "Encase in protection" , "Put into scabbard" , "stow away safely" .)