Graceful seabird (4)
I believe the answer is:
tern
'graceful seabird' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tern that I've seen before include "Small gull with forked tail" , "Rent out the bird" , "Long-winged aquatic bird" , "Three-masted schooner" , "Pay rent for seabird" .)