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Criminal at sea getting cross at stern of ship (6)

Ross

I believe the answer is:

pirate

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I believe this is a quadruple definition!!

'criminal' is the first definition.
(pirate is a kind of criminal)

'at' is a link.

'sea' is the second definition.
(thesaurus)

'getting' acts as a link.

'cross at stern' is the third definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'of' acts as a link.

'ship' is the fourth definition.
(pirate is a kind of ship)

Can you help me to learn more?

(Other definitions for pirate that I've seen before include "Run off without permission" , "Robber on the high scas" , "Silver, perhaps" , "Appropriate stuff" , "Freebooter" .)

I've seen this clue in The Telegraph.
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