Crossword Genius

See note (4,5)

Ross

There are a few possibilities for this:

tune up

urge on

(Other definitions for tune up that I've seen before include "Work on engine" , "make corrections to pitch" , "service for drivers" , "Prepare for performance" , "This should improve engine performance" .)

I've seen this clue in The Independent.
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.