Cat - one of a number in the pound (5)

I believe the answer is:

ounce

I believe this clue is a double definition.

'cat' is the first definition.
(ounce can mean a snow leopard)

'one of a number in the pound' is the second definition.
(I've seen this before)

(Other definitions for ounce that I've seen before include "16 for a pound" , "prowler" , "one of a number in the pound" , "Big cat of Asia" , "One-sixteenth of pound" .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app