Swift falcon (9)
I believe the answer is:
peregrine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swift falcon</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for peregrine that I've seen before include "Powerful falcon" , "Kind of falcon" , "Large falcon" , "bird" .)