Irregular movements many gusts may produce (9)

I believe the answer is:

nystagmus

'irregular movements' is the definition.
(irregular movements of eyes)

'many gusts may produce' is the wordplay.
'may produce' indicates anagramming the letters (I've seen 'might produce' mean this (I've seen this in other clues)).
'many'+'gusts'='manygusts'
'manygusts' anagrammed gives 'NYSTAGMUS'.

I've seen this clue in The Times.

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