All the stage is his world (5)
I believe the answer is:
actor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">all the stage is his world</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 actor that I've seen before include "One in a play" , "one to take on roles" , "Film star" , "Thespian, stage performer" , "Theatre player" .)