Eg, a tiger (3,3)
I believe the answer is:
big cat
'eg a tiger' is the definition.
(tiger is a kind of big cat)
This is all the clue.
(Other definitions for big cat that I've seen before include "ounce, say" , "Any large wild feline, like tiger or cheetah" , "Eg, Lion or tiger" , "Lion, for example" , "Lion or tiger, say" .)