Crossword Genius

____ up (cram) (4)

Ross

I believe the answer is:

bone

(Other definitions for bone that I've seen before include "Eg, rib" , "It makes up the skeleton" , "Scapula, radius or tibia?" , "Carpal or tarsal, for example" , "See 6" .)

I've seen this clue in the Penny Press.
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