A parrot would be a bit mad to imitate a crow! (5)
I believe the answer is:
macaw
'a parrot' is the definition.
(I know that macaw is a type of parrot)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for macaw that I've seen before include "Largest parrot" , "Large and showy Latin American parrot" , "Large bright parrot" , "Brightly-coloured parrot" , "New World parrot" .)