Crossword Genius

Visible air pollution (4)

Ross

I believe the answer is:

haze

(Other definitions for haze that I've seen before include "Mist or shimmer due to heat" , "Mistiness" , "A thin mist, perhaps from heat" , "'Mist, light fog (4)'" , "Lack of definition or precision" .)

I've seen this clue in the USA Today, the Universal, the Newsday.com, The Guardian and the LA Times.
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.