Crossword Genius

You could take one to the advice bureau (3)

Ross

I believe the answer is:

cab

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'bureau' is the definition.
The definition and answer can be both man-made objects 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.

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(Other definitions for cab that I've seen before include "Taxi to hold an engine-driver" , "A taxi in New York" , "An American taxi" , "info for citizens provided here" , "A taxi in America" .)

I've seen this clue in the Evening Standard.
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