Thus might mixers create a fuss! (5,1,4)

I believe the answer is:

cause a stir

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'thus might mixers' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'create a fuss' is the wordplay.
'create' becomes 'cause' (causing is a kind of creating).
'fuss' becomes 'stir' (synonyms).
'cause'+'a'+'stir'='CAUSE A STIR'

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

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