Very sweet Riesling, perhaps -- a few, not all, tucking in (7)
I believe the answer is:
winsome
'very sweet' is the definition.
'winsome' can be an answer for 'sweet' (thesaurus). I'm unsure of the 'very' bit.
'riesling perhaps a few not all tucking in' is the wordplay.
I cannot quite understand how this works, but
'few' could be 'some' (associated in meaning) and 'some' is located in the answer.
'in' is within the answer.
A single letter 'w' remains 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 winsome that I've seen before include "Captivating" , "Charming (in a childlike way?)" , "Holding an appeal" , "Attractive - I'm so new (anag)" , "Agreeable" .)