Bike crank, essentially (5)
I believe the answer is:
rotor
(Other definitions for rotor that I've seen before include "Arm moving" , "Helicopter vane" , "Revolving bar" , "I go round" , "Turning part of machine, palindromic" .)
I believe the answer is:
rotor
(Other definitions for rotor that I've seen before include "Arm moving" , "Helicopter vane" , "Revolving bar" , "I go round" , "Turning part of machine, palindromic" .)