Coming before a religious leader (5)
I believe the answer is:
prior
This clue is a double definition.
'coming before' is the first definition.
(I've seen this before)
'a religious leader' is the second definition.
(I've seen this before)
(Other definitions for prior that I've seen before include "boss of Monk?" , "Pre-existing; head friar" , "former conviction" , "Former - churchman" , "Deputy head of an abbey" .)