Amount of wine in a vessel or little basket (6)
I believe the answer is:
punnet
'basket' is the definition.
(I know that punnet is a type of basket)
'amount of wine in a vessel or little' is the wordplay.
I cannot quite understand how this works, but
'amount' could be 'net' (net is a kind of amount) and 'net' is present in the answer.
The remaining letters 'pun' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for punnet that I've seen before include "Strawberry etc. container" , "Little box (of strawberries?)" , "Small light basket for fruit" , "Small basket for berries" , "Strawberry basket" .)