Wild cat of little weight (5)
I believe the answer is:
ounce
I believe this is a double definition.
'wild cat' is the first definition.
(I've seen this before)
'little weight' is the second definition.
(unit of weight)
'of' is the link.
(Other definitions for ounce that I've seen before include "Small quantity - snow leopard" , "one of several in a pound" , "Approx. twenty-eight gm" , "Panther, perhaps" , "Imperial unit of weight" .)