Breaker that may sink a ship (9)
I believe the answer is:
destroyer
'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" .)