| Rating | Solver | Clue |
|---|---|---|
| PROBE | Investigation | |
| INQUIRY | Investigation | |
| ENQUIRY | Official investigation | |
| EXPLORATION | Geographical investigation | |
| REOPENED | Resumed (investigation) | |
| INQUISITION | Searching investigation | |
| INQUEST | Official investigation | |
| HEARING | Judicial investigation | |
| RESEARCH | Scientific investigation | |
| PERVESTIGATION | Thorough investigation. | |
| EXPERIMENT | Test or investigation | |
| INDAGATION | Search; inquiry; investigation. | |
| BIOGNOSIS | The investigation of life. | |
| COGNOSCIBLE | Liable to judicial investigation. | |
| AUDIT | Investigation into internal fraud items | |
| CZECH | Report investigation of Prague citizen | |
| COLDCASE | Suspended investigation of cool bag | |
| CASE | Problem requiring investigation (as in church) | |
| CHECKINGOUT | Paying up and leaving the hotel after investigation | |
| INVESTIGATIVE | Given to investigation; inquisitive; curious; searching. | |
| INQUISITIVE | Given to examination, investigation, or research; searching; curious. | |
| MICROSCOPY | The use of the microscope; investigation with the microscope. | |
| DISQUISITIVE | Relating to disquisition; fond discussion or investigation; examining; inquisitive. | |
| BOTANIZE | To seek after plants for botanical investigation; to study plants. | |
| ANALOGISM | Investigation of things by the analogy they bear to each other. | |