| Clue | Source | Date |
|---|---|---|
| Wobble at the brink of | ||
| Risk falling from, as the brink | Wall Street Journal | 22 Feb 2020 |
| Barely balance atop | The Washington Post Sunday | 19 May 2019 |
| Be about to fall off of, perhaps | ||
| Struggle for balance atop | ||
| Wobble atop | ||
| Straddle unstably |