Circus swing (7)
I believe the answer is:
trapeze
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">circus swing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for trapeze that I've seen before include "Circus acrobatsO swing" , "Flying bar for acrobatics" , "swingers' bar" , "High swing" , "Big top swing" .)