| Clue | Source | Date |
|---|---|---|
| Tough on the stomach | Wall Street Journal | 27 Jun 2026 |
| Sharp or sour in taste | New York Times | 12 Oct 2020 |
| A little sharp | New York Times | 23 Nov 2017 |
| A little sharp | ||
| Hard on the stomach | Wall Street Journal | 02 Jan 2015 |
| Hard on the stomach | ||
| Sour, as a stomach | ||
| Tasting sharp | ||
| Rather sour | ||
| Sourish | ||
| Like some upset stomachs | ||
| Sharp and bitter | ||
| Sharp | ||
| Sour | ||
| Sharp; bitter | ||
| Sharp |