Related Clues:

• Go off the deep end?
• Go off the board
• __ bar
• Sub maneuver
• *Seedy hotel room
• Spring from a board
• See 89-Across
• Unsavory bar
• Dumpy bar
• Enter a pool, perhaps
• One may be given a 10
• Sub captain's command
• Plunge head first
• Ring pretense
• Jackknife, in the pool