Crossword Genius

Being drunk, sounded sloshed! (7)

Ross

I believe the answer is:

slurped

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'being drunk' is the definition.
The definition and answer can be both related to consumption as well as being past participle verbs.
Perhaps there's an association between them I don't understand?

I can't explain the rest of the clue.

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I've seen this clue in the Evening Standard.
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