Archimedean machine
I believe the answer is:
lever
'archimedean machine' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lever that I've seen before include "Revel in lifting bar" , "Rigid bar pivoting about a fulcrum" , "exert force, in a way" , "Revel with prising tool" , "Rigid bar pivoted about a fulcrum" .)