Unofficial receiver (5)
I believe the answer is:
fence
'receiver' is the definition.
(I know that receiver can be written as fence)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for fence that I've seen before include "Receiver of stolen goods" , "Beat about the bush" , "feature in horse-racing?" , "Stolen goods dealer" , "Barrier that serves to enclose an area" .)