A ship in which sherry may be served (8)

I believe the answer is:

schooner

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'a ship' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for schooner that I've seen before include "wooden vessel" , "boat" , "9 [CONTAINER" , "Swift sailing vessel - sherry glass" , "Type of glass" .)

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

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