Diving coastal bird (9)
I believe the answer is:
cormorant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">diving coastal bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cormorant that I've seen before include "Large diving seabird" , "Proverbially gluttonous seabird" , "Large, voracious seabird" , "Large, long-necked seabird" , "Aquatic bird" .)