Crossword Genius

Opening that can admit light or allow ventilation (6)

Ross

I believe the answer is:

window

(Other definitions for window that I've seen before include "See 8" , "Glassy area" , "time still available" , "Interval for action" , "Opening to admit light" .)

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.