long-tailed game bird (8)
I believe the answer is:
pheasant
'long-tailed game bird' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pheasant that I've seen before include "Large game bird" , "Wildfowl" , "Long-tailed gamebirds, male has bright feathers" , "Colourful game bird" , "something to pluck?" .)