She's out of chop suey after butchering rodent (5)

I believe the answer is:

coypu

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'rodent' is the definition.
(I know that coypu is a type of rodent)

I can't explain the rest of the clue.

(Other definitions for coypu that I've seen before include "S American rodent inadvertently introduced into Europe" , "S. American "beaver"" , "Beaver-like animal" , "Beaver lookalike" , "Large South American beaver-like rodent" .)

I've seen this clue in the Sydney Morning Herald.

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