Butterfly larva (11)
I believe the answer is:
caterpillar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">butterfly larva</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 caterpillar that I've seen before include "crawler" , "Tiny creature" , "Butterfly/moth larva" , "sort of grub" , "Butterfly grub" .)