Vaudeville star, one celebrating? (6)

I believe the answer is:

lauder

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'vaudeville star' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's a link between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for lauder that I've seen before include "Knighted Scottish music hall comedian" , "One celebrating" , "music-hall entertainer" .)

I've seen this clue in The Times.

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