Parrot beginning to make a sound like a crow (5)
I believe the answer is:
macaw
'parrot' is the definition.
(macaw is a kind of parrot)
'beginning to make a sound like a crow' is the wordplay.
'beginning to' indicates taking the first letters.
'sound like a crow' becomes 'caw'.
The initial letter of 'make' is 'm'.
'm'+'a'+'caw'='MACAW'
(Other definitions for macaw that I've seen before include "Colourful creature" , "Tropical bird" , "Type of parrot" , "colourful flyer" , "Large colourful parrot" .)