Crossword Genius

The works outing in one? (7)

Ross

I believe the answer is:

omnibus

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'one?' is the definition.
(thesaurus)

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(Other definitions for omnibus that I've seen before include "collection of novels?" , "Several books in one" , "One can expect to be moved by this" , "public service" , "Collection of writings" .)

I've seen this clue in The Times.
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