| ICHNOLOGY | The science of fossilised footprints (9) |
| ICHNITE | A fossilised footprint, also known as a trace fossil (7) |
| PLIOSAURS | Mega-predators of the Jurassic sea; a 155-million-year-old fossilised skull of which was found in Dorset in 2009 (9) |
| AMBER | Form of fossilised tree resin used for jewellery; or, the traffic light and colour acting as a cautionary signal between red and green (5) |
| STEGOSAUR | Sees self in Tarsus, as the remains of a fossilised beast (9) |
| PALEOBOTABY | Of fossilised plants (11) |
| SASQUATCH | In Canadian folklore, a hairy beast or manlike monster said to leave huge footprints (9) |
| ACETRACKS | Red Baron's footprints? |
| CROWSFEET | Footprints we produce with a smile? |
| EVIDENCES | Footprints |
| CHALK | Proverbially antithetical with cheese, the coccolithophores' fossilised remains forming the lime-rich rock of coastal cliffs, downs, grasslands and sandy beds of seas (5) |
| ILES | Greg, author of the 2003 novel The Footprints of God (4) |
| TRAIL | Beaten or blazed path in the wilds; or, a series of signs or clues such as footprints, spoor or line-shaped vaporous clouds marking the passage of a person, quarry or aircraft (5) |
| YETI | Tibetan name of a "little man-like animal", aka abominable snowman, supposed to leave its footprints or tracks in the snow of the Himalayas (4) |
| TRACE | To follow a path or line, be it of a drawing through translucent paper or of the footprints/vestige of a crime (5) |
| LEAKEY | Mary ---, archaeologist who led the excavation of the Laetoli footprints |
| ZOIC | Of rocks, strata, etc, containing fossilised evidence of life |
| APSALMOFLIFE | Longfellow poem featuring the line 'Footprints on the sands of time' |
| SANDS | "Footprints in the ___ of time" |
| TRACED | Followed the footprints of |
