Possible Clues:

• One pulling in boat
• Maybe he's a stroke with a sweep
• He may well have rows with his neighbours
• Member of rowing crew
• A manor's all for a row
• Stroker ace?
• One might be discovered by Samoan river craft
• A Roman's at sea -- one's likely to be rowing
• Possibly stroke male pigs bishop released on island
• A ransom put together for Oxbridge blue, perhaps