Beefeaters possibly replacing ravens with corgi after government cut (10)

I believe the answer is:

carnivores

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'beefeaters' is the definition.
Although both the answer and definition are plural nouns, I don't understand how one could define the other.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for carnivores that I've seen before include "who won't touch Greens?" , "Meat-eaters" .)

I've seen this clue in The Independent.

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