Long-legged shorebird (6)
I believe the answer is:
avocet
'long-legged shorebird' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for avocet that I've seen before include "Wading bird with long bill" , "RSPB emblem" , "Long-legged wader" , "Long-legged shorebird with upward-curving bill" , "Flier" .)