Crossword Genius

Tavern hosting sex-party and massages, low life's beginning to upset local modernists (10,5)

Ross

I believe the answer is:

bloomsbury group

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'tavern' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for bloomsbury group that I've seen before include "Literary people" , "1920s London writers' circle" , "set of intellectuals" , "Fry part of it" .)

I've seen this clue in The Independent.
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