Related Clues:

• Harmony, informally
• Accord
• Line up
• Word with in or lip
• See 27-Down
• In --- (harmonious)
• Together, after 'in'
• Compatible (with ''in'')
• Word with lip or 'N
• Coordination
• Fit the sound to the action
• Choirs may sing in it
• Lip-___ (mouth the words)
• Bring into harmony
• Make harmonious