Fish hawks (7)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fish hawks</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 ospreys that I've seen before include "Sea hawks and members of a British rugby team" , "Fishing birds" , "Fish-eating birds of prey" , "Preys so close to fishing eagles" , "Fish-eating hawks" .)