Crested parrot (8)
I believe the answer is:
cockatoo
'crested parrot' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cockatoo that I've seen before include "Australasian parrot" , "Lightly coloured crested parrot" , "Australian parrot" , "Illegal Aussie look-out man" , "White parrot" .)