Film legend Greta (5)
I believe the answer is:
garbo
'film legend greta' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for garbo that I've seen before include "She sought solitude" , "Female player once" , "Greta . . . . ., film star who wanted to be alone" , "Swedish-born actress" , "Swedish actress who wanted to be alone" .)