Related Clues:

• Isaac with a bow
• Unstable 'rents'?
• Whaler's rear end
• Shock jock
• Unnecessarily severe
• All business
• Back, on a skipjack
• Ungentle
• Crueler than necessary
• Tiller's place
• Tiller's locale
• Inflexible about rules
• Back on the high seas?
• Observing exact rules
• Unyielding part of the ship