The ____ theatre is the National Theatre's main auditorium (7)

I believe the answer is:

olivier

(Other definitions for olivier that I've seen before include "Great English actor playing rilievo" , "ham? Definitely not!" , "Sir Laurence, once a great British actor" , "Sir Laurence -, twentieth century English actor" , "N Messiaen, French composer" .)

I've seen this clue in The Times.

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