| Answer | Crossword Clue |
|---|---|
| OCTAD | Two vocal quartets |
| OCTET | Two quartets |
| EIGHTSOME | Two quartets |
| OCTET | Two quartets? |
| OCTAD | Two quartets? |
| OCTADS | Quartets times two |
| OCTET | Two quartets, combined |
| OCTET | Two barbershop quartets |
| OCTET | Two quartets combined |
| MISSISSIPPI | River with two quartets? |
| OCTET | Merger of two quartets |
| OCTET | Two quartets side-by-side |
