Tool returned for money (4)
I believe the answer is:
loot
'for money' is the definition.
(loot can mean stolen money)
'tool returned' is the wordplay.
'returned' shows that the letters should be reversed in order.
'tool' back-to-front is 'LOOT'.
(Other definitions for loot that I've seen before include "Prize" , "Steal property (in war)" , "Plunder and ransack" , "Pillage; money" , "Orton play; money" .)