Related Clues:

• Sloop group
• They rise and fall periodically
• ''High'' or ''low'' water
• Sand castle's undoing
• Captain's squad
• It can get high every day
• Workers
• Sailors' concerns
• They have highs and lows
• It gets turned in a comeback
• Theater workers
• It may wash away castles
• USS Enterprise staff
• It goes out regularly
• Cox's group