Such prices feature in the wine trade (3)
I believe the answer is:
net
'such prices feature' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'in the wine trade' is the wordplay.
'in' indicates a hidden word.
'NET' can be found hidden inside 'the wine trade'.
Can you help me to learn more?
(Other definitions for net that I've seen before include "Amount remaining after deductions" , "Score a goal" , "Open-meshed material (used for catching things?)" , "Make" , "Clear profit or gain" .)