| Clue | Source | Date |
|---|---|---|
| Condition drawn up and settled, transformed trial in practice (5-4) | ||
| Examination not under laboratory conditions | The Telegraph General Knowledge | 21 Jul 2019 |
| Left diets (anag.); scientific trial | The Telegraph Quick | 01 Apr 2017 |
| On-site trial | ||
| Put a sample through its paces | ||
| Survey a sample | ||
| Practical experiment |