Use a fork, say (4)

I believe the answer is:

tune

(Other definitions for tune that I've seen before include "Song" , "Adjust for better performance" , "'He who pays the piper calls the ...'" , "Adjust (car engine); air" , "Melody; adjust (engine)" .)

I've seen this clue in the LA 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.