Circus tumbler (7)
I believe the answer is:
acrobat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">circus tumbler</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 acrobat that I've seen before include "Spectacular gymnast" , "One appearing head over heels" , "circus artiste" , "performer of risky feats?" , "flipper" .)