Settled with priest's help (4)
I believe the answer is:
paid
'settled' is the definition.
(paying is a kind of settling)
'with priest's help' is the wordplay.
'with' means one lot of letters go next to another.
'priest' becomes 'p' (ecclesiastical abbreviation).
'help' becomes 'aid' ('aid' can be a synonym of 'help').
'p' put next to 'aid' is 'PAID'.
(Other definitions for paid that I've seen before include "Compensated" , "Remunerated" , "Aggressive, rowdy" , "Settled financially" , "Forked out" .)