Related Clues:

• It gets you from station to station
• One changing pitches
• Person working on a piano
• One tweaking pitches
• One who fixes flats?
• Caught swimmer, one with a good ear?
• Piano string adjuster
• Device that helps get the right pitch
• Pitch adjuster
• The "dial" in "Don't touch that dial"
• Pitch-fixing pro
• Pitching aid?
• Skilled listener: fish in one's ear?
• One ensuring accuracy on a grand scale?
• Guitar chord tweaker