Hand on new stooge (4)
I believe the answer is:
pawn
'stooge' is the definition.
(I've seen this in another clue)
'hand on new' is the wordplay.
'hand' becomes 'paw' (synonyms).
'on' is a charade indicator (letters next to each other).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'paw'+'n'='PAWN'
(Other definitions for pawn that I've seen before include "Exploited person" , "Lowest ranking chessman" , "Chesspiece" , "Part with temporarily to raise money" , "Chess piece -- puppet" .)