Caribou or moose, eg (4)
I believe the answer is:
deer
I believe this clue is a double definition.
'caribou' is the first definition.
(I've seen this in another clue)
'moose eg' is the second definition.
(moose is a kind of deer)
(Other definitions for deer that I've seen before include "Hoofed mammal" , "Like a power switch" , "The - Hunter, 1978 film" , "Grazing animal(s)" , "Eg, stag or doe" .)