Related Clues:

• Lifeguard's concern
• Ocean movement
• Mariner's concern
• Neap, for one
• Current event
• Pool creator
• See 45 Down
• Marigraph activator
• Ocean's rise and fall
• Semidiurnal occurrence, roughly
• Brand with a giant target in its logo
• It gets high on the beach
• 'The __ Is High' (Blondie hit)
• Shore eroder
• Ebb --