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 can't see how they can define each other.
I cannot understand how the remainder of the clue works.
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" .)