Trade group wasted claret (6)
I believe the answer is:
cartel
'trade group' is the definition.
The answer and definition can be both groups as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'wasted claret' is the wordplay.
'wasted' indicates an anagram.
'claret' anagrammed gives 'CARTEL'.
Can you help me to learn more?
(Other definitions for cartel that I've seen before include "Group of firms that agree fixed prices in order to limit competition" , "Organisation for political or market control" , "Group formed to limit competition" , "Business group" , "Business combination to limit competition" .)