Prisoner executed getting pardon (7)
I believe the answer is:
condone
'pardon' is the definition.
(both can mean to excuse wrongdoing)
'prisoner executed getting' is the wordplay.
'prisoner' becomes 'con' (abbreviation for 'convict').
'executed' becomes 'done' (I've seen this in another clue).
'getting' is a charade indicator (letters next to each other).
'con'+'done'='CONDONE'
(Other definitions for condone that I've seen before include "Approve, sanction" , "Overlook intentionally" , "Excuse made" , "Reluctantly sanction" , "'Excuse, overlook (7)'" .)