Parrot originally making a sound like a crow (5)
I believe the answer is:
macaw
'parrot' is the definition.
(macaw is a kind of parrot)
'originally making a sound like a crow' is the wordplay.
'originally' says to take the initial letters.
'sound like a crow' becomes 'caw'.
The first letter of 'making' is 'm'.
'm'+'a'+'caw'='MACAW'
(Other definitions for macaw that I've seen before include "colourful flyer" , "Large and showy Latin American parrot" , "Tropical parrot" , "brilliant winger" , "Colourful creature" .)