Possible Clues:

• 'You can't turn it in the lock (5,4)'
• Long freight carrier, on the water
• Rocky, having struck bow in tilt — narrow vessel
• Waterways vessel
• Narrow vessel
• One on waterway putting a priest's robe inside jacket
• Is a chap able to circle in club vessel?
• One may tour Venice in jacket over a white robe
• One or two horsepower transport
• One for inland water cruising