Waterbird of Europe, Asia and North America with a white bill and forehead (4)

I believe the answer is:

coot

(Other definitions for coot that I've seen before include "Black waterbird" , "Stupid or eccentric man" , "Waterfowl" , "'Slow-flying, duck-like bird (4)'" , "Slow-flying bird, resembling a duck" .)

I've seen this clue in The Mirror.

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