Small quantity for cat (5)
I believe the answer is:
ounce
I believe this is a double definition.
'small quantity' is the first definition.
(I've seen this before)
'for cat' is the second definition.
(ounce can mean a snow leopard)
(Other definitions for ounce that I've seen before include "Light weight coming in on cue" , "Jaguar" , "Wildcat" , "Enough to tip the scales" , "Small quantity - snow leopard" .)