Red wines are spoilt in pots (6)

I believe the answer is:

pinots

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'red wines' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.

'spoilt in pots' is the wordplay.
'spoilt' indicates anagramming the letters.
'in'+'pots'='inpots'
'inpots' with letters rearranged gives 'PINOTS'.

'are' is the link.

Can you help me to learn more?

(Another definition for pinots that I've seen is " grapes".)

I've seen this clue in the Sydney Morning Herald.

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