Losing head, bint finished with betrothed (8)
I believe the answer is:
intended
'betrothed' is the definition.
(thesaurus)
'losing head bint finished' is the wordplay.
'losing head' means to remove the first letter.
'finished' becomes 'ended' ('ended' can be similar in meaning to 'finished').
'bint' with its initial letter taken away is 'int'.
'int'+'ended'='INTENDED'
'with' is the link.
(Other definitions for intended that I've seen before include "Set out" , "Informally one's fiance or fiancee" , "Meant - fiancee" , "wanted from the outset" , "Had in mind to" .)