Small invertebrate (6)
I believe the answer is:
insect
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small invertebrate</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 insect that I've seen before include "For example, fly" , "Eg, ant" , "Soldier perhaps" , "Small six-legged creature" , "may be attracted to a website?" .)