What goes around comes around, all the same (5)
I believe the answer is:
rotor
This clue is a double definition.
'what goes around' is the first definition.
'comes around all the same' is the second definition.
(Other definitions for rotor that I've seen before include "Spinner" , "Arm moving" , "Part of engine that revolves" , "US state South of L. Erie" , "Revolving part of machinery" .)