Relatives married, not me (7)
I believe the answer is:
mothers
'relatives' is the definition.
(mother is a kind of relative)
'married not me' is the wordplay.
'married' becomes 'm'.
'not me' becomes 'others' (other people).
'm'+'others'='MOTHERS'
(Other definitions for mothers that I've seen before include "Dams" , "Fusses over" , "Parents" .)