Acts of revolution? (5)

I believe the answer is:

turns

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'acts of revolution?' is the definition.
'turns' can be an answer for 'acts'. I'm unsure of the 'of revolution?' bit.

This is all the clue.

(Other definitions for turns that I've seen before include "Rotations" , "Rotates" , "Bends" , "Changes direction" , "Moves in a new direction" .)

I've seen this clue in the Evening Standard.

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