One into wine, note, that’s average (8)
I believe the answer is:
mediocre
'that's average' is the definition.
(synonyms)
'one into wine note' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is found in the answer.
'note' could be 're' (as in do-re-mi) and 're' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for mediocre that I've seen before include "Fair, middle of the road" , "Nothing special" , "Ordinary" , "Not very good" , "Fairly bad" .)