Possible Clues:

• Feature of a schooner
• Canvas giving trouble after ship crosses river
• Contradictory orders to the yachtsman for extra canvas
• A-list, say, planned something on yacht, maybe
• Schooner sight
• Versatile auxiliary wind-catcher
• Contradictory orders to the yachtsman for more canvas
• Don't go and catch the wind on board
• Don't go and go yachting with this hoisted
• Something on ship could be contaminated by salt, I say