The sky, they say (5)

I believe the answer is:

limit

(Other definitions for limit that I've seen before include "Restrict - term" , "Put restriction on" , "speed restriction applied" , "Ceiling" , "Constrain" .)

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.