Crossword Genius

Up to, informally (3)

Ross

I believe the answer is:

til

(Another definition for til that I've seen is " Sesame".)

I've seen this clue in the USA Today, the Universal and 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.