Fairies (6)
I believe the answer is:
pixies
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fairies</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pixies that I've seen before include "small fairies in children's tales" , "Mischievous fairies" , "Little (mischievous) people" , "Elves, imps" , "Small supernatural beings in fairy tales" .)