| THUNBERG | Swedish environmental activist born on January 3, 2003 (5,8) |
| GRETA | Swedish environmental activist born on January 3, 2003 (5,8) |
| SWAMPY | Nickname of a British environmental activist born in 1973 (6) |
| POSTDATE | Write "January 15" on a check you hand to someone on January 3, for example |
| GRETATHUNBERG | Young Swedish environmental activist who is known for urging action on global warming and was nominated for the 2019 Nobel Peace Prize: 2 wds. |
| XAVIERCUGAT | Spanish-American bandleader once married to Abbe Lane born on January 1, 1900 |
| VERNETROYER | Mini-Me portrayer in the Austin Powers movies born on January 1, 1969 |
| JDSALINGER | "The Catcher in the Rye" author born on January 1, 1919 |
| MLK | "Letter from Birmingham Jail" writer, who was born on January 15, 1929 |
| ROD | English singer ... Stewart was born on January 10, 1945 |
| KEATING | Future Australian PM Paul ... was born on January 18, 1944 |
| BURNS | Robert -; born on January 25, a poet celebrated annually with a traditional haggis supper (5) |
| PAULREVERE | Patriot in the American Revolution known for a midnight ride born on January 1, 1735 |
| TUPELO | City in NE Mississippi in which Elvis Presley was born on January 8 1935 (6) |
| YOKOONO | Artist, singer and peace activist, born 1933, who said: "I was born into a very imporant family Japan" (4,3) |
| NINETRACKMIND | Debut album by 18-Across, released in January: 3 wds. |
| TUI | NZ bird ___ it turns up around middle of January (3) |
| NEWYEAR | Diseased yew brought Inside close to 1 January (3, 4) |
| STATE | Alaska, since January 3, 1959 |
| UNA | She's seen taking a spin in January (3) |
