Amps (up) (4)
'amps up' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for revs that I've seen before include "Rotations of a motor, in short" , "Units of engine speed (abbr)" .)
I've seen this clue in the L.A. Times Daily, the New York Times, The Washington Post and the Newsday.
I've seen this clue in the L.A. Times Daily, the New York Times, The Washington Post and the Newsday.
I've seen this clue in the LA Times.
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