Crossword Genius

Working cat (6)

Ross

I believe the answer is:

mouser

'working cat' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for mouser that I've seen before include "Rodent catcher" , "Cat that's good at catching small rodents" , "Predatory cat" , "One getting rid of vermin" , "Preying cat" .)

I've seen this clue in the Boston Globe, the L.A. Times Sunday, the LA Times and the Wall Street Journal.
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