Priest's subordinate (6)
I believe the answer is:
deacon
'priest's subordinate' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for deacon that I've seen before include "Junior minister" , "Layman attending to church duties" , "Priest's assistant" , "Christian rank below a priest" , "Ordained cleric" .)