Haile Selassie follower, for short (5)
I believe the answer is:
rasta
'haile selassie follower for short' 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 "Member of WI religion" , "One following religion" , "Dreadlocked person (abbr.)" , "religious follower" , "Dreadlocked follower of Haile Selassie" .)