Money found with stolen ammunition (8)
I believe the answer is:
buckshot
'ammunition' is the definition.
(I've seen this before)
'money found with stolen' is the wordplay.
'money' becomes 'bucks' (informal term for dollars).
'found with' means one lot of letters go next to another.
'stolen' becomes 'hot' (stolen goods are 'hot').
'bucks'+'hot'='BUCKSHOT'
(Other definitions for buckshot that I've seen before include "Lead used to kill deer" , "Lead used in hunting" , "Projectiles for hunting game" , "Large lead pellets" , "sort of ammunition" .)