| Answer | Crossword Clue |
|---|---|
| TERNAL | Composed of three. |
| PROTON | Particle composed of three quarks |
| PROTON | It's composed of three quarks |
| ETUDES | Chopin composed three collections of them |
| VIC | Man's nickname composed of three Roman numerals |
| HAIM | American pop-rock band composed of three sisters |
