Supporter or follower (8)
I believe the answer is:
adherent
I believe this is a double definition.
'supporter' is the first definition.
(I've seen this before)
'follower' is the second definition.
(adherent is a kind of follower)
(Other definitions for adherent that I've seen before include "One supports" , "Weep" , "Loyal follower, one who sticks" , "Loyal follower - sticks close" , "Follower, partisan" .)