Famous actor ousting second one for title role in musical (6)

I believe the answer is:

oliver

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'musical' is the definition.
(musical based on Oliver Twist)

I can't explain the rest of the clue.

(Other definitions for oliver that I've seen before include "Lionel Bart musical" , "Paladin (with Roland)" , "Dickensian role?" , "First name of Dickens boy Twist" , "Dickens boy named Twist" .)

I've seen this clue in The Times.

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