Grief overwhelming young male champion (7)
I believe the answer is:
paladin
'champion' is the definition.
(I know that champion can be written as paladin)
'grief overwhelming young male' is the wordplay.
'grief' becomes 'pain' (I've seen this in another clue).
'overwhelming' is an insertion indicator.
'young male' becomes 'lad' (I've seen this in another clue).
'pain' going around 'lad' is 'PALADIN'.
(Other definitions for paladin that I've seen before include "Knight errant; a peer of Charlemagne" , "Knightly champion" , "paragon" , "Chivalrous knight" , "hero" .)