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With spread teachers until recently drink the fruit of the vine (9,6)

Ross

I believe the answer is:

butternut squash

I'm a little stuck... Click here to teach me more about this clue!

'vine' is the definition.
(butternut squash is a kind of vine)

'with spread teachers until recently drink the fruit' is the wordplay.
I cannot quite understand how this works, but
'spread' could be 'butter' (butter is a spread) and 'butter' is found in the answer.
'teachers' could be 'nut' (National Union of Teachers) and 'nut' is found within the answer.
'drink' could be 'squash' (I've seen this before) and 'squash' is found in the answer.
No letters remain.
This explanation may well be incorrect...

'of the' is the link.

Can you help me to learn more?

(Another definition for butternut squash that I've seen is " Fruit".)

I've seen this clue in The Times.
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