Earwig or fly, eg (6)
I believe the answer is:
insect
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">earwig</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">fly eg</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(fly is a kind of insect)</span><br/ ><br/ ></span>
(Other definitions for insect that I've seen before include "Small arthropod creature" , "Invertebrate, often winged" , "Small invertebrate arthropod" , "Ladybird, for example" , "Creepy-crawly" .)