Related Clues:

• Aerobics-class prop
• Tuning fork's output
• Instrument quality
• Coloration
• Degree
• Concern of a musician or bodybuilder
• Dance part
• Tenor
• Ladder part
• Scale interval
• What calisthenics improve
• Going together, after 'in'
• Distinctive quality
• Strengthen, with 'up'
• Voice nuance