Crossword Genius

On the __: running (3)

Ross

I believe the answer is:

lam

(Other definitions for lam that I've seen before include "Flee hastily" , "Batter" , "Hit hard or repeatedly" , "On this, you're fleeing, from the police" , "Go on the - - , (US sl.)" .)

I've seen this clue in the LA Times.
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