Snow leopard's small weight (5)
I believe the answer is:
ounce
I believe this is a double definition.
'snow leopard's' is the first definition.
(ounce is an alternative name for the snow leopard)
'small weight' is the second definition.
(I've seen this before)
(Other definitions for ounce that I've seen before include "Twelfth of a pound" , "Wild animal" , "Jaguar" , "One-sixteenth of pound" , "A light imperial measure of weight" .)