Related Clues:
- Air impurifier
- Urban alert cause
- Travel writing on reflection that’s bad, if inspired
- Urban portmanteau
- Air quality reducer
- Sunset obscurer
- Metropolitan visibility problem
- Hindrance to visibility
- Urban eye irritant
- Unwanted blanket
- Industrial portmanteau
- Layer over some cities
- City choker
- Paddle at a 24-Across, perhaps
- Small feline in urban haze