Crane-fly (5-4-4)
I believe the answer is:
daddy-long-legs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">crane-fly</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 daddy-long-legs that I've seen before include "Gladly send dog (anag) - kind of fly" , "Cranefly" , "Crane fly" .)