Crossword Genius

Loco, flyer (6)

Ross

I believe the answer is:

cuckoo

I believe this clue is a double definition.

'loco' is the first definition.
(I know that loco can be written as cuckoo)

'flyer' is the second definition.
(I know that cuckoo is a type of flyer)

(Other definitions for cuckoo that I've seen before include "Bird (with a bad reputation)" , "nuts" , "Cracked" , "Bird with a two-note call" , "Bananas" .)

I've seen this clue in The Times.
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