Woman’s returning to add belts and collar (9)
I believe the answer is:
apprehend
'collar' is the definition.
(synonyms)
'woman's returning to add belts' is the wordplay.
'woman's' becomes 'her' (belonging to a woman).
'returning' shows that the letters should be reversed in order.
'to add' becomes 'append' ('append' can be a synonym of 'add').
'belts' indicates putting letters inside (inserted letters are tied or belted up).
'her' in reverse letter order is 'reh'.
'reh' put within 'append' is 'APPREHEND'.
'and' acts as a link.
(Other definitions for apprehend that I've seen before include "Fear - arrest" , "Be terribly afraid" , "Arrest - grasp" , "Recognise - arrest - suspect" , "Arrest (someone)" .)