| ETHNOLOGY | Go the only route to investigation of races (9) |
| FORENSIC | Relating to investigation of one thousand killed in alien attack (8) |
| SEARCHING | Overarching secrecy leads to investigation (9) |
| ETYMOLOGY | Investigation of derivation of words (9) |
| CEREOLOGY | The study, or investigation, of crop circles (9) |
| EDITORIAL | Guardian site desperate to bandage wound around paper's leader - investigation of some concern? (10,9) |
| ESPIONAGE | Guardian site desperate to bandage wound around paper's leader - investigation of some concern? (10,9) (see 12D) |
| FINETOOTH | Equipment for thorough investigation of terribly cold bit of the moon (4-5,4) |
| BRIEFCASE | Summary investigation of personal bag (9) |
| STONEWALL | Obstruct investigation of granite partition (9) |
| APARTHEID | Help to suppress charge over the illegal segregation of races (9) |
| GOINGOVER | Investigation of embargo in government section |
| MEANSTEST | Implies trial will involve investigation of finances |
| GRANDPRIX | One of a series of races held to determine the annual Drivers' World Championship in Formula One (5,4) |
| GENEALOGY | Investigation of pedigrees |
| TOUGHMEAT | Sounds like the athletics had a hard number of races, as the shins are hard and leathery (5,4) |
| ENACTMENT | A bout to beat people in a series of races - some performance |
| ASCERTAIN | Prove an offence around horse sure to win second of races |
| ADVERSARY | Rival upset Dave and Ray about first and last of races (9) |
| ISLEOFMAN | Three legs characterise this series of races here (4,2,3) |
