Crested bird (6)
I believe the answer is:
hoopoe
'crested bird' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for hoopoe that I've seen before include "bird required" , "Crested bird, pink with black and white wings" , "Pink Eurasian bird with black and white wings and tail" , "occasional visitor here" , "Bird with curved bill" .)