Not bubbly, but nevertheless a grape product (5,4)

I believe the answer is:

still wine

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'not bubbly' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'nevertheless a grape product' is the wordplay.
'nevertheless' becomes 'still' (synonyms).
'a grape product' becomes 'wine' (I've seen this in another clue).
'still'+'wine'='STILL WINE'

'but' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish News and The Globe and Mail.

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