Crossword Genius

Strengthen, with "up" (4)

Ross

I believe the answer is:

beef

'strengthen with up' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for beef that I've seen before include "Bovine flesh" , "Brawn; grumble" , "Type of meat" , "Complain; meat" , "Strength - grievance" .)

I've seen this clue in the L.A. Times Daily, The New York Times, the Newsday and the Universal.
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