Silly bird? (6)
I believe the answer is:
cuckoo
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" .)