"Ninotchka” star (5)
I believe the answer is:
garbo
'ninotchka star' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for garbo that I've seen before include "Swedish film star who wanted to be alone" , "Swedish film actress Greta" , "Swedish actress who wanted to be alone" , "Famous film actress" , "Greta -, Swed. actress" .)