| Clue | Source | Date |
|---|---|---|
| Of a numbers system in mathematics, using three as a base (7) | ||
| Of a number system in mathematics, having a base of three (7) | ||
| Looking unhappy about navy at the third level | ||
| Visibly upset about sailors in threes | ||
| In music, ____ form uses contrasting sections A and B, followed by a repeat of A | The Times Specialist Sunday | 20 Mar 2022 |
| Inclined to cry about R number based on three ... | The Telegraph Cryptic | 21 Apr 2021 |
| Threefold | ||
| Threefold | ||
| Threefold. | ||
| Containing three variables. |