What might satisfy a boxer’s hunger? (3,4)

I believe the answer is:

dog food

This clue could be a double definition.

'what might satisfy a boxer's' is the first definition.
(boxer is a breed of dog)

'hunger?' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

(Another definition for dog food that I've seen is " Canine sustenance".)

I've seen this clue in The Times.

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