Related Clues:
- Jimi Hendrix's 'Purple ___'
- "Purple ___" (rock classic)
- Jet trail
- Urban concern
- Atmospheric pollution
- Reason for an air quality alert
- Houston air problem
- Fog or smog
- Factory overhead?
- Confused state of mind
- Metropolitan hangover?
- Hazardous haze
- Feature of a bad air day?
- L.A. haze
- City skyline blurrer