Past its use-by date (5)

I believe the answer is:

stale

(Other definitions for stale that I've seen before include "Boring" , "Musty or hackneyed" , "Old; musty" , "No longer take" , "Mouldy or hackneyed" .)

I've seen this clue in The Wall Street Journal.

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.