Long-plumed wader (5)
I believe the answer is:
egret
'long-plumed wader' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for egret that I've seen before include "White wading-bird" , "Heron-like wader" , "Kind of heron with long white feathers" , "White-plumed wader" , "Stork-like bird" .)