What a packer might use, a soldier might eat (3)
I believe the answer is:
wad
'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" .)