The most common and most likely answer to this crossword clue is the 8 letter word HANEPOOT
I've seen this crossword clue in The Guardian
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More clues leading to the result HANEPOOT
Buddy explains!

The straight part
We know that "grape for wine" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case grape for wine = hanepoot.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HANEPOOT mean?
HANEPOOT noun- The muscat blanc d'Alexandrie.
- Wine made from muscat blanc d'Alexandrie.