Crossword Genius

Black-and-white swimmer (4)

Ross

I believe the answer is:

orca

'black-and-white swimmer' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for orca that I've seen before include "Killer-whale" , "Large predator" , "Marine creature" , "grampus" , "Cor! a killer whale" .)

I've seen this clue in the USA Today and the LA Times.
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