Weightlifting move (4)
I believe the answer is:
jerk
'weightlifting move' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for jerk that I've seen before include "Jolt; tug" , "Yank, idiot" , "Short sudden movement - idiot" , "fool" , "Stupid person" .)