Type of heron (5)
I believe the answer is:
egret
'type of heron' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for egret that I've seen before include "Long-plumed heron" , "Heron-like wader" , "Type of heron" , "Seabird" , "White, plumed waterbird" .)