Cougar or jaguar (3)
I believe the answer is:
cat
I believe this is a double definition.
'cougar' is the first definition.
(I've seen this in another clue)
'jaguar' is the second definition.
(I've seen this in another clue)
(Other definitions for cat that I've seen before include "one's pyjamas? They're an excellent thing" , "An old whip with nine tails" , "Tabby" , "Common pet" , "Tiger, for instance" .)