Related Clues:
- Urban alert cause
- Travel writing on reflection that’s bad, if inspired
- Urban portmanteau
- Air quality reducer
- Metropolitan visibility problem
- Uproar is interrupting one terribly
- Unwelcome clatter
- Urban eye irritant
- Unwanted blanket
- Industrial portmanteau
- Layer over some cities
- City choker
- White ___ (random signal)
- Small feline in urban haze
- Gray skies, maybe