Reclusive film star (5)
I believe the answer is:
garbo
'reclusive film star' is the definition.
(I've seen this before)
This is all the clue.
(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" .)