Related Clues:

• What calisthenics improve
• Italicize
• Distinctive quality
• Strengthen, with 'up'
• Voice nuance
• Nasality
• Quality of voice
• Pre-dial sound
• Singer's concern
• Phone sound
• Whole note, e.g.
• Musical notation
• Spanish diacritic
• ___ poem
• Señor's squiggle