One of the Apostles (5)
I believe the answer is:
peter
'one of the apostles' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for peter that I've seen before include "Boy's name - safe" , "- Pan, eternal youth" , "and 16: Actor who played Hercule Poirot" , "Safe - name for a man" , "-- Sellers, comic actor" .)