Possible Clues:

• Steered a boat
• 10 in school instructed from the back
• Was boat's steersman persuaded to ditch Cambridge's number 2?
• Steered a rowing boat
• Steered (boat)
• Directed the rowers
• Guided, say, four times in school
• Directed the rowing crew
• Having a helmsman
• Steered (a rowing boat)