Fish hawk (6)
I believe the answer is:
osprey
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fish hawk</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for osprey that I've seen before include "Large fish-eating bird of prey" , "Flier" , "Large bird preying on fish in inland waters" , "Flyer" , "A feather trimming (6)" .)