Caught dealer, one who trades in wicked goods (8)
I believe the answer is:
chandler
'one who trades in wicked goods' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'caught dealer' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'dealer' becomes 'handler' (I've seen this before).
'c'+'handler'='CHANDLER'
Can you help me to learn more?
(Other definitions for chandler that I've seen before include "Dealer in ship's equipment" , "Dealer supplying shipment" , "Retailer" , "Retail dealer in provisions and supplies, for ships say" , "Boat supplies seller" .)