Jerked (6)
I believe the answer is:
yanked
'jerked' is the definition.
('yank' can be a synonym of 'jerk')
This is the entire clue.
(Other definitions for yanked that I've seen before include "Pulled with sudden sharp tug" , "Pulled sharply" , "Tugged sharply at" , "Pulled hard at, gave sudden tug" , "Jerked vigorously" .)