Cur goes off with whip (7)
I believe the answer is:
scourge
'whip' is the definition.
(I know that scourge is a type of whip)
'cur goes off' is the wordplay.
'off' is an anagram indicator.
'cur'+'goes'='curgoes'
'curgoes' with letters rearranged gives 'SCOURGE'.
'with' acts as a link.
(Other definitions for scourge that I've seen before include "Source of great trouble" , "Person/thing causing great suffering; whip" , "Whip - bane" , "Whip; source of suffering" , "form of punishment" .)