Related Clues:

• Visible air
• Foggy state
• Smoky state
• Miasma
• Navigational hazard
• Persecute pledges
• Visible air pollution
• Mist or shimmer due to heat
• Daze, fog
• A thin mist, perhaps from heat
• Mist, light fog
• 'Mist, light fog (4)'
• "Purple ___" (Hendrix)
• Skyline-blurring phenomenon
• Atmospheric aggregation