Well-heeled wife in the pink having lost first husband (7)
I believe the answer is:
wealthy
'well-heeled' is the definition.
(thesaurus)
'wife in the pink having lost first husband' is the wordplay.
'wife' becomes 'w'.
'in the pink' becomes 'healthy' (I've seen this before).
'having lost' suggests deleting specific letters.
'first husband' becomes 'h' (1st letter of 'husband').
'healthy' with 'h' removed is 'ealthy'.
'w'+'ealthy'='WEALTHY'
(Other definitions for wealthy that I've seen before include "Affluent" , "Rich and prosperous" .)