Long-billed bird (5)
I believe the answer is:
heron
'long-billed bird' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for heron that I've seen before include "Big bird" , "Large British wading bird" , "Grey or white long-legged wading bird" , "Bird of the Rhone, strangely" , "Graceful grey bird with long neck" .)