Disease-spreading insect (8)
I believe the answer is:
mosquito
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disease-spreading insect</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 mosquito that I've seen before include "Malaria transmitter" , "Sucker" , "possible disease carrier" , "Insect, the female of which sucks blood" , "Disease-bearing insect" .)