Related Clues:
- In ___ (on the same page)
- Lip-__: mouth the words
- Something to sing in
- Perfect agreement
- Lip-___ (pretend to sing)
- In ___ (working in harmony)
- Coordinate, with 'up'
- Coordinate, with "up"
- Full agreement
- Complete harmony
- A trio may sing in it
- Dubbing concern
- Coordination, for short
- Lip-___ (pretend sing)
- Together, with ''in''