Reddish hue (4)

I believe the answer is:

rust

(Other definitions for rust that I've seen before include "Reddish-brown oxide coating" , "Reddish-brown coating formed on metal by moisture" , "deteriorate" , "Reddish-brown coating formed on metal by damp" , "Reddish oxide coating on iron" .)

I've seen this clue in The New York 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.