Animal whip (3)
I believe the answer is:
cat
This clue is a double definition.
'animal' is the first definition.
(I know that cat is a type of domesticated animal)
'whip' is the second definition.
(cat o' nine tails, cat for short is a type of whip)
(Other definitions for cat that I've seen before include "Animal; converter; boat" , "Moggy" , "Feline mammal" , "eg Leopard" , "See 21" .)