Heron with white plumage (5)

I believe the answer is:

egret

(Other definitions for egret that I've seen before include "Mainly white heron" , "Type of heron" , "Seabird" , "Type of forty eight Ac" , "White-feathered wading bird" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.