Member of the clergy over other ranks (6)
I believe the answer is:
pastor
'member of the clergy' is the definition.
(I've seen this before)
'over other ranks' is the wordplay.
'over' becomes 'past' (I've seen this before).
'other ranks' becomes 'or' (military abbreviation).
'past'+'or'='PASTOR'
(Other definitions for pastor that I've seen before include "A sport (anag)" , "Churchman" , "Flock's leader" , "Padre perhaps" , "One with a flock (of people)" .)