Leading actor (4)
I believe the answer is:
star
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">leading actor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(eg the star of the show)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for star that I've seen before include "Hollywood figure" , "Distant sun" , "Celebrated performer" , "Heavenly light" , "Luminary" .)