Small circus performer (4)
I believe the answer is:
flea
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small circus performer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for flea that I've seen before include "Wingless, jumping insect" , "Irritating jumper?" , "Little jumper?" , "Jumping, blood-sucking insect" , "Tiny parasite" .)