Flying fox, eg (5,3)
I believe the answer is:
fruit bat
'flying fox eg' is the definition.
(flying fox is a kind of fruit bat)
This is the entire clue.
(Other definitions for fruit bat that I've seen before include "Long-snouted, large-eyed nectar feeder" , "Flying fox; bait turf (anag.)" , "Flying fox, for example" , "Large flying mammal" .)