Makes quiet, in a way (4)

I believe the answer is:

oils

(Other definitions for oils that I've seen before include "art exhibits perhaps" , "Soil, oddly, used by painters" , "paintings?" , "Well-produced" , "Painting medium" .)

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.