Devotee of Haile Selassie, informally
I believe the answer is:
rasta
'devotee of haile selassie informally' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rasta that I've seen before include "Jamaican believer" , "Jamaican cultist" , "Dreadlocked devotee" , "Jamaican cult follower (informally)" , "Member of WI religion" .)