Daft bird (6)
I believe the answer is:
cuckoo
I believe this clue is a double definition.
'daft' is the first definition.
(I know that daft can be written as cuckoo)
'bird' is the second definition.
(I know that cuckoo is a type of bird)
(Other definitions for cuckoo that I've seen before include "Out to lunch" , "Bird; sort of clock" , "slightly mad type" , "Slightly crazy -- bird" , "flier?" .)