They go for a spin, she drives erratically (9)

I believe the answer is:

dervishes

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'they go for a spin' is the definition.
The definition suggests an adverb but the answer is not.

'she drives erratically' is the wordplay.
'erratically' is an anagram indicator.
'she'+'drives'='shedrives'
'shedrives' with letters rearranged gives 'DERVISHES'.

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I've seen this clue in The Independent.

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