Won't such a crook give anything away? (8)
I believe the answer is:
receiver
If this is the answer I cannot explain how the clue works.
Can you help me to learn more?
(Other definitions for receiver that I've seen before include "When a business fails, this person is appointed to liquidate or protects assets" , "Radio; fence" , "manager for a wind-up?" , "One getting" , "television" .)