Crossword Genius

What a packer might use, a soldier might eat (3)

Ross

I believe the answer is:

wad

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'eat' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how one could define the other.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for wad that I've seen before include "A thick bundle, maybe of money" , "A bundle as of documents or banknotes" , "Small mass of soft material" , "Bankroll; sandwich (slang)" , "Bundle of soft material or of banknotes" .)

I've seen this clue in the Evening Standard.
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