Answer:

retuned

Answer	Crossword Clue
RETUNED	Adjusted an engine
RETUNED	Fixed, as a piano
RETUNED	Like pianos, periodically

RETUNED	Adjusted violin frets
RETUNED	Pitched better?

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.