(They) leave the stage (6)
I believe the answer is:
exeunt
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">they leave the stage</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 exeunt that I've seen before include "direction to get cast away" , "Trivial details" , "More than one exit?" , "Stage direction to a group of actors (Latin)" , "(Actors) leave stage" .)