Reduced volume covering question over British entertainment industry (7)

I believe the answer is:

showbiz

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'entertainment industry' is the definition.
(I know that entertainment industry can be written as showbiz)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for showbiz that I've seen before include "Theatre, films, TV etc" , "Entertaining" , "Stage and film entertainment" , "Theatre, TV, movies etc" , ""Bright lights" entertainment?" .)

I've seen this clue in The Times.

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