Housefly larva (6)
I believe the answer is:
maggot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">housefly larva</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for maggot that I've seen before include "Legless larva" , "youngster to fly" , "Lava of a fly" , "immature flyer" , "Fly larva" .)