Related Clues:

• 'Cabaret' lyricist Fred
• Narrow gradually
• Slacken off
• Tidal action
• Dwindle, as support
• Tide's retreat
• Quiet down
• Pre-bulb lighting, perhaps
• Flow's pal
• Lessen, as a storm
• Get progressively thinner
• Regression
• Go out, like the tide
• Outward tidal flow
• Companion of flow