Drink makes socialist complain audibly (7)

I believe the answer is:

redwine

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'drink' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I can't see?

'makes socialist complain audibly' is the wordplay.
'makes socialist' becomes 'red' (I can't justify this - if you can you should believe this answer much more).
'complain' becomes 'whine' (whining is a kind of complaining).
'audibly' indicates a 'sounds like' (homophone) clue.
'whine' sounds like 'wine'.
'red'+'wine'='REDWINE'

Can you help me to learn more?

I've seen this clue in The Daily Express.

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