Ostrich-like bird (3)
I believe the answer is:
emu
'ostrich-like bird' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for emu that I've seen before include "Ostrich-like bird" , "that doesn't get off the ground" , "Parky's nemesis" , "Flightless bird of Australia, like ostrich" , "unit of measurement" .)