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Rowers collapse, many times (9)

Ross

I believe the answer is:

eightfold

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'rowers collapse many times' is the definition.
I can't tell whether this definition defines the answer.

'rowers collapse' is the wordplay.
'rowers' becomes 'eight' (eight can mean a crew of eight rowers).
'collapse' becomes 'fold' (as in a business folding).
'eight'+'fold'='EIGHTFOLD'

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(Another definition for eightfold that I've seen is " Size of increase".)

I've seen this clue in The Daily Express.
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