Fixed, as a piano (5)

I believe the answer is:

tuned

(Other definitions for tuned that I've seen before include "Adjusted (eg, a piano)" , "Of engine, adjusted to run properly" , "Correctly adjusted (eg in pitch)" , "(Of a piano) properly adjusted" , "Adjusted (musical) pitch" .)

I've seen this clue in the King Feature Syndicate.

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.