Related Clues:

• Gradual decline
• Go down, as the tide
• Get narrower
• Slowly reduce, as a cliff
• Fade, like the tide
• 'Cabaret' lyricist Fred
• Adversely affect, as one's confidence
• Narrow gradually
• Slacken off
• Vanish gradually
• Eat at
• Tidal action
• Dwindle, as support
• Tide's retreat
• Quiet down