Crossword Genius

Thick haze (4)

Ross

I believe the answer is:

smog

(Other definitions for smog that I've seen before include "Pollution fog" , "Fog polluted by smoke" , "Smoky fog" , "Pollutant haze" , "Thick polluted mist" .)

I've seen this clue in The Guardian.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.