Related Clues:

• Connected (with)
• Adjusted a Hummer's hum
• Best way to sing
• Harmonized
• Right on the note
• Singing well
• Pitch-perfect
• Set the radio
• Did a garage job
• True, as a tuba
• Accurately pitched
• Correct, pitch-wise
• Fixed flats?
• Singing properly
• Hitting the right notes