Crossword Genius

Improve, as an argument (7)

Ross

I believe the answer is:

sharpen

(Other definitions for sharpen that I've seen before include "Raise pitch of" , "Restore edge to knife" , "Hone (a knife blade)" , "Make pointed" , "Put a keen edge on" .)

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.