Crossword Genius

Breaker that may sink a ship (9)

Ross

I believe the answer is:

destroyer

I'm a little stuck... Click here to teach me more about this clue!

'ship' is the definition.
(destroyer is a kind of ship)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for destroyer that I've seen before include "Siva?" , "Apollyon maybe" , "Apollyon's" , "Red oyster (anag)" , "Large warship" .)

I've seen this clue in The Globe and Mail.
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