Jah worshiper (5)
I believe the answer is:
rasta
'jah worshiper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rasta that I've seen before include "West Indian cult member" , "Member of cult worshipping Haile Selassie" , "Jamaican cultist" , "Jamaican cult follower (informally)" , "Member of WI religion" .)