Crossword Genius

Device on a duct (5)

Ross

I believe the answer is:

valve

(Other definitions for valve that I've seen before include "Flow regulator" , "Something to regulate flow" , "Device to regulate flow" , "Part of brass instrument" , "Flow-controlling device" .)

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.