Prise (5)
I believe the answer is:
lever
'prise' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for lever that I've seen before include "Revel (anag.)" , "exert force, in a way" , "Revel in lifting bar" , "Lifting bar pivoted on a fulcrum" , "Rigid bar pivoting about a fulcrum" .)