Possible Clues:

• Slicing tool of fast sailing ship
• This has an edge to it when all at sea
• See 1 down
• This will give one a slice of the T in truce
• Sharp at sea
• Vessel (but not a clipper!)
• See 1
• Vessel cold, say
• A clipper? No, a smaller vessel
• The sort of 12 across that goes through the water?