Whirls (7)
I believe the answer is:
gyrates
'whirls' is the definition.
('gyrate' can be a synonym of 'whirl')
This is the entire clue.
(Other definitions for gyrates that I've seen before include "Spins, whirls" , "Goes round and round" , "gets into a spin" , "Moves in a spiral course" , "turns" .)