Related Clues:

• Drop in the ocean
• Undergo recession
• Wash out to sea
• 'Cabaret' lyricist
• Hit song of the '50s
• Fall back, as a tide
• Diminution
• Partner of flow
• Go to a lower level
• Drop back
• Period of decline
• Slack off
• Go slowly
• Shallow period
• Good time to collect seashells