Engine part
'engine part' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cam that I've seen before include "Rotating projection; river" , "Runner" , "Shaft on a rotating part in machinery" , "Rotating part in machine; river" , "It controls the motion of engine cylinder valves" .)
'engine part' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fan that I've seen before include "Zealot" , "Manually wielded cooling device" , "Cool - enthusiast" , "Cooler; enthusiast" , "Devoted admirer or air cooler" .)
'engine part' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for piston that I've seen before include "Part of a machine with a plunging motion" , "Points about driving rod" , "Trumpet part" , "Brass instrument valve" , "Transmitter of motion from camshaft to valve" .)
'engine part' is the definition.
('camshaft' is part of 'engine')
This is all the clue.
(Other definitions for camshaft that I've seen before include "What imparts motion to engine's valves" , "Internal combustion engine valve controller" , "Fat chasm (anag) - internal-combustion engine part" , "driving force" , "Rod to operate valves in an engine" .)
'engine part' is the definition.
(I've seen this in another clue)
This is all the clue.