Crossword Genius

Killer whales (5)

Ross

I believe the answer is:

orcas

'killer whales' is the definition.
('orca' can be a synonym of 'killer whale')

This is all the clue.

(Other definitions for orcas that I've seen before include "Killers" , "Killer whales" .)

I've seen this clue in the Canadiana, the King Feature Syndicate, the Sydney Morning Herald, The Telegraph, The Wall Street Journal, the LA Times, The New York Times, The Irish Times and the Universal.
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