They successfully market wine stores on the radio (7)
I believe the answer is:
sellers
'stores on the radio' is the definition.
Although both the answer and definition are plural nouns, I don't understand how they can define each other.
'they successfully market wine' is the wordplay.
I cannot quite see how this works, but
'market' could be 'sell' (I've seen this before) and 'sell' is found within the answer.
The remaining letters 'ers' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sellers that I've seen before include "kind of market" , "British actor, star of the 17" , "Vendors" , "Peter" .)