Subdivision of an act (5)
I believe the answer is:
scene
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">subdivision of an act</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 scene that I've seen before include "Subdivision of act in play" , "Landscape; part of play" , "Spectacle" , "View -part of play" , "bit of an act" .)