Ship — schooner, perhaps? (6)
I believe the answer is:
vessel
This clue is a double definition.
'ship' is the first definition.
(thesaurus)
'schooner perhaps?' is the second definition.
(schooner is a kind of vessel)
(Other definitions for vessel that I've seen before include "Container - ship" , "Craft for water transportation" , "Large boat; container" , "bowl?" , "Ship, or artery" .)