Crossword Genius

Unmasking coke and speed runners (4)

Ross

I believe the answer is:

rugs

I'm a little stuck... Click here to teach me more about this clue!

'runners' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for rugs that I've seen before include "Carpets" , "Floor mats or thick blankets" , "Wigs?" , "Floor covering" .)

I've seen this clue in the Sydney Morning Herald.
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