| KELSO | Record-breaking racehorse of the 1960s |
| SEABISCUIT | A champion thoroughbred American racehorse of the 1930s and '40s; a symbol of hope during the Great Depression (10) |
| TREVE | Racehorse of the year at the 2013 Cartier Racing Awards |
| LONHRO | 2004 Australian Racehorse of the Year, nicknamed the "Black Flash" (6) |
| MANOWAR | 1920 Preakness and Belmont Stakes winner named by ESPN as the greatest American racehorse of the 20th century: 3 wds. |
| EMANCIPATION | 1984 Australian Racehorse of the Year (12) |
| VEANDERCROSS | 1993 Australian Cup winner and Racehorse of the Year (12) |
| MAYBE | 1978 Australian Racehorse of the Year, ... Mahal (5) |
| STABLE | Any one of the equine dwellings forming the Royal Mews; racehorses of a particular yard collectively; or, heya in sumo (6) |
| ROWLEY | Old ___ , favourite racehorse of King Charles II (6) |
| MILER | Racehorse of a sort |
| ELIOT | Nicknamed "possum" by fellow poet Ezra Pound, the author of a series of "cat poems", written for his godchildren, that later formed the basis of a record-breaking musical (5) |
| BONNEVILLESALTFLATS | Location of the record-breaking event in the 12A clue |
| EOWYN | Record-breaking storm that hit Ireland, the Isle of Man and the UK on 24 January (5) |
| NUMBERCRUNCHING | Record-breaking processing of lots of data (6,9) |
| REIGN | Period of rule, such as the Queen's record-breaking 65-year-long one (5) |
| GRESLEY | Steam locomotive engineer who designed the Flying Scotsman and the A4 class record-breaking Mallard (7) |
| BLINDINGLIGHTS | Single by the Weeknd that spent a record-breaking ninety weeks on the Billboard Hot 100, ending in September, 2021 |
| LINDBERGH | The kidnapping and murder of his son in 1932 overshadowed, for a time, his achievements as a record-breaking flier (9) |
| ROACHE | William _, record-breaking soap star who's notched up a whopping 63 years on the cobbles of Weatherfield (6) |
