Delighted with priest (3)
I believe the answer is:
eli
'priest' is the definition.
(biblical figure)
'delighted with' is the wordplay.
'with' says the answer is hidden in the clue.
'ELI' can be found hidden inside 'delighted'.
(Other definitions for eli that I've seen before include "patriarch" , "Priest, teacher of Samuel" , "- Wallach, US actor" , "Highest priest at Shiloh" , "OT high priest" .)