Related Clues:

• Pull strings?
• Strain
• Harmony
• Ignore, with 'out'
• Composer's output
• Tin Pan Alley product
• It's hard for some people to carry
• Bring into resonance
• Air
• Whistler's whistle
• See 67-Across
• Harmonize
• Fix a flat?
• Bring to proper pitch
• Composer's creation