Dues payer (6)
I believe the answer is:
member
'dues payer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for member that I've seen before include "either left or right wing, say" , "Person belonging to a particular club or society" , "One of a group or club" , "Part of body or one who belongs to a club" , "Limb - element - one in society" .)