Reddish-brown concoction for user on street. (6)

I believe the answer is:

russet

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'reddish-brown' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

(Other definitions for russet that I've seen before include "Apple - colour" , "Brown with a reddish tinge" , "Brownish-red apple" , "Red/brown; a fabric; an apple" , "Autumnal reddish brown" .)

I've seen this clue in The Irish Times.

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