Not a Scottish bird, but a flighty native of tropical America (5)
I believe the answer is:
macaw
'america' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
I cannot 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 "Chattering cousin of a cockatoo" , "Largest parrot" , "brilliant winger" , "colourful flyer" , "New World parrot" .)