Related Clues:

• In __ (moving together)
• Relationship when things occur at the same time
• iPad-to-iMac activity
• New York City in a whirl after dollar provides short form of perfect harmony
• Follower of "'N" or "lip"
• Match up, as timepieces
• Does this mean Crosby, Stills, Nash and Young reformed for harmony?
• Rapport
• Follower of "lip"
• Together, after "in"
• Audible drop in harmony
• What collaborators should be in
• Match (up)
• Lip-___ (fake sing)
• ___ in progress (iPhone phrase)