Epistle apostle (4)
I believe the answer is:
paul
'epistle apostle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for paul that I've seen before include "One of the apostles" , "- Dombey (Dickens); - Jones, dance" , "---23, C20 novelist" , "Road-to-Damascus convert" , "fellow" .)