Crossword Genius

Who will protect this carnivore? (9)

Ross

I believe the answer is:

beefeater

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

This is the entire clue.

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(Other definitions for beefeater that I've seen before include "Yeoman warder of the Tower of London" , "Yeoman of the Guard; carnivore" , "royal bodyguard" , "One might guard" , "no vegetarian?" .)

I've seen this clue in The Times.
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