Crossword Genius

Onomatopoeic bird (6)

Ross

I believe the answer is:

cuckoo

'onomatopoeic bird' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for cuckoo that I've seen before include "Slightly crazy -- bird" , "Crackpot bird?" , "counting as bird? Yes and no" , "Bats" , "No home bird, this" .)

I've seen this clue in The Telegraph.
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