Reclusive film star (5)
I believe the answer is:
garbo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reclusive film star</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 garbo that I've seen before include "Swedish film star who wanted to be alone" , "film-star" , "Reclusive film star" , "Old film actress" , "film star? Yes and no" .)