Strikes with a whip (6)
I believe the answer is:
lashes
'strikes with a whip' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lashes that I've seen before include "Binds" , "Eyeshades for punishments" , "Punitive strokes of a whip" , "Eye hairs" , "Strikes with a whip" .)