Parrots make half cut bird sounds (6)
I believe the answer is:
macaws
'parrots' is the definition.
(I know this)
'make half cut bird sounds' is the wordplay.
'half cut' indicates taking half.
'bird sounds' becomes 'caws' (I've seen this in another clue).
'make' halved is 'ma'.
'ma'+'caws'='MACAWS'
(Other definitions for macaws that I've seen before include "Birds" , "Long-tailed, brilliantly-coloured parrots" , "Brightly-coloured parrots" , "More than one bird" , "Long-tailed parrots of Central and South America" .)