Related Clues:

• Swan, for one
• Plunge into the water
• Seedy establishment
• Shabby joint
• Submarine captain's command
• Joint in bad condition
• It might land you in deep water
• Go off the deep end?
• Go off the board
• __ bar
• Sub maneuver
• Spring from a board
• See 89-Across
• Unsavory bar
• Dumpy bar