Crossword Genius

Silly bird? (6)


I believe the answer is:


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This could be a double definition.

'silly' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'bird?' is the second definition.
(I know that cuckoo is a type of cuculiform bird)

Can you help me to learn more?

(Other definitions for cuckoo that I've seen before include "The bird that invades another's nest" , "It takes over other birds' nests" , "Doolally - bird" , "Intruder bird in the nest" , "fool" .)

I've seen this clue in The Globe and Mail.
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