Related Clues:

• Effect of the moon's gravitational pull
• Backing correct movement in the main?
• 'Time and ___ wait for no man'
• Current change after a revolution
• Sea's regular movement
• A rising ___ lifts all boats
• Aquatic rise and fall
• Shoreline changer
• Maybe arrange a paper round -- one should roll up twice a day
• Beach widener, at times
• Thing creeping up on a beach
• "High" or "low" ocean occurrence
• Water flow at the beach
• Brand of inedible detergent pods