Shorebird with bill curving upwards (6)
I believe the answer is:
avocet
'shorebird with bill curving upwards' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for avocet that I've seen before include "Black-and-white shorebird with upward-curving bill" , "Wading bird - octave (anag)" , "Wading bird with upturned bill" , "Shorebird with bill curving upwards" , "Wading bird with curved bill" .)