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