| Answer | Crossword Clue |
|---|---|
| QUATERNION | Set of four. |
| QUATERNARY | Set of four |
| RACK | One of four in a Scrabble set |
| TYRE | One of a set of four on a London taxi |
| HIGHSOCIETIES | The Four Hundred, Cliveden Set, etc. |
| TRIESTE | Free Territory set up by Big Four, 1947. |
| QUARTILE | Statistical dividing point in a four-group data set |
| SATCHMO | 1957 four-LP jazz set subtitled "A Musical Autobiography" |
