Jamaican believer (5)
I believe the answer is:
rasta
'jamaican believer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rasta that I've seen before include "Dreadlocked follower of Haile Selassie" , "worshipper from Jamaica" , "Bob Marley, for one" , "One dreaded" , "Dreadlocked devotee" .)