Feathered six-footer (3)
I believe the answer is:
emu
'feathered six-footer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for emu that I've seen before include "Ostrich-like bird" , "Parky's nemesis" , "European project" , "it can't get off the ground" , "Physics unit" .)