Lash (4)
'lash' is the definition.
(I know that lash can be written as whip)
This is the entire clue.
(Other definitions for whip that I've seen before include "He maintains discipline among members" , "Person who enforces discipline in a political party" , "Legislator appointed by a party to enforce discipline" , "Political officer who ensures party members attend and vote" , "Address insultingly" .)
'lash' is the definition.
(I know that scourge is a more specific form of lash)
This is all the clue.
(Other definitions for scourge that I've seen before include "Curse; whip" , "administer punishment" , "Plague; whip" , "Bane, curse" , "cat" .)