Crossword Genius

The last word heard by one about to be shot? (6)

Ross

I believe the answer is:

cheese

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'shot?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for cheese that I've seen before include "Brie or Edam, say" , "Product of milk curds" , "Gloucester or cheddar, say" , "Brie or Emental, say" , "Soft or more solid creamy food" .)

I've seen this clue in The Times.
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