Crossword Genius

Scourge of sidewalks (3)

Ross

I believe the answer is:

gum

(Other definitions for gum that I've seen before include "Gingeva is its technical name" , "Chewy stuff, hard to clean away" , "Glue; jelly-like sweet" , "Chewed sweet" , "surrounding roots of teeth?" .)

I've seen this clue in The Wall Street Journal.
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