Some, for a start, dreaded disciple (5)
I believe the answer is:
rasta
'disciple' is the definition.
(I know that Rasta is a type of disciple)
'some for a start dreaded' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'RASTA' is hidden within 'for a start dreaded'.
(Other definitions for rasta that I've seen before include "religious follower" , "Bob Marley, for one" , "Member of religious movement originating in Jamaica" , "Jamaican cultist" , "Religious adherent" .)