Priest restricted by piles coming back (3)
I believe the answer is:
eli
'priest' is the definition.
(Biblical character)
'restricted by piles coming back' is the wordplay.
'restricted by' says the answer is hidden in the clue.
'coming back' says the letters should be written in reverse.
'ile' can be found hidden inside 'piles'.
'ile' back-to-front is 'ELI'.
(Other definitions for eli that I've seen before include "patriarch" , "Distort then untruth to get a Biblical character" , "OT high priest" , "Old Testament priest, the prophet Samuel's teacher" , "Biblical teacher of Samuel" .)