One way to be wise? (6)

I believe the answer is:

street

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'one way' is the definition.
(street is a kind of way)

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

(Other definitions for street that I've seen before include "Part of motorist's route" , "Public road in a conurbation" , "Paved road" , "City thoroughfare" , "Way < in which common man is" .)

I've seen this clue in the Evening Standard.

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