Cry out for a bit of luck with a bird (6)

I believe the answer is:

cuckoo

I'm a little stuck... Click here to teach me more about this clue!

'bird' is the definition.
(cuckoo is a kind of bird)

I can't explain the rest of the clue.

(Other definitions for cuckoo that I've seen before include "that can emerge at hourly intervals" , "Bananas" , "Hourly you might hear this" , "building no nest?" , "fool" .)

I've seen this clue in the Evening Standard.

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