A barrier or a dealer in stolen property (5)
I believe the answer is:
fence
I believe this is a double definition.
'a barrier' is the first definition.
(I know that fence is a type of barrier)
'a dealer in stolen property' is the second definition.
(I've seen this before)
(Other definitions for fence that I've seen before include "Receiver of stolen goods" , "Barrier; deal in stolen goods" , "use blade" , "Shield" , "Barrier; receiver" .)