Criminal spotted, then led away (4)
I believe the answer is:
pimp
'criminal' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pimp that I've seen before include "Arrange sex partners for others" , "who solicits business?" .)