You're that ; what John Travolta and Olivia Newton-John sang at the end of Grease (3)

I believe the answer is:

the

(Other definitions for the that I've seen before include "See 10 Across" , "Article is quite definite" , "French drink" , "Finis" , "SECOND PART OF 23" .)

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.

You're __ that __; what John Travolta and Olivia Newton-John sang at the end of Grease (3)

You're that ; what John Travolta and Olivia Newton-John sang at the end of Grease (3)