Great work ( Latin ) (6,4)

I believe the answer is:

magnum opus

(Other definitions for magnum opus that I've seen before include "Great work" , "one's best" , "major achievement" , "Writer's greatest work" , "Masterpiece" .)

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.