Tool exchanged for money (4)
I believe the answer is:
loot
'for money' is the definition.
(loot can mean stolen money)
'tool exchanged' is the wordplay.
'exchanged' indicates an anagram.
'tool' is an anagram of 'LOOT'.
(Other definitions for loot that I've seen before include "Haul" , "Pillage; money" , "Plunder and ransack" , "Swag, booty" , "Tool found among plunder" .)