Possibly unite as kinswomen (7)
I believe the answer is:
aunties
'kinswomen' is the definition.
(I know this)
'possibly unite as' is the wordplay.
'possibly' is an anagram indicator.
'unite'+'as'='uniteas'
'uniteas' with letters rearranged gives 'AUNTIES'.
(Other definitions for aunties that I've seen before include "Female relatives" , "family members" , "some women in family" , "Older female friends" , "older women" .)