Graceful bird (4)
I believe the answer is:
swan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">graceful bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for swan that I've seen before include "black, in 7th" , "Large waterbird" , "Stately aquatic bird" , "Sweet name 8 [OF SHAKESPEARE]" , "Shakespeare is called The .... of Avon" .)