| SLOANE | Hans, Anglo-Irish physician and naturalist whose collection founded the British Museum and after whom a London square is named (6) |
| HANSSLOANE | Physician who founded the British Museum (4,6) |
| HANS | Irish physician whose 1753 bequest became the foundation of the British Museum and the Natural History Museum |
| IONIC | Style of Greek column used for the British Museum and the US Capitol (5) |
| RAFFLES | With an ant, butterfly fish, horse race, woodpecker and the world's largest flower named after him, a statesman and naturalist who founded Singapore, the Zoological Society of London and London Zoo (7 |
| ROBERTCLIVE | Soldier and statesman who founded the British Empire in India (6.5) |
| CUVIER | French zoologist and naturalist who founded the sciences of palaeontology and comparative anatomy (6) |
| MUNRO | Hector Hugh -; author "Saki" whose collection of short stories Beasts and Super-Beasts includes The Hen, The Quince Tree and The Lumber Room (5) |
| BROOKE | Rupert --; author whose collection 1914 and Other Poems contains The Old Vicarage, Grantchester and The Soldier (6) |
| OSWALD | ____ Mosley, English politician who founded the British Union of Fascists in 1932 (6) |
| BEWICK | With a species of swan named after him, the wood engraver and naturalist who penned A History of British Birds (6) |
| WEDO | Words sung by the Stonecutters after "Who holds back the electric car? Who makes Steve Guttenberg a star?," on "The Simpsons" |
| SIR | Artist, yachtsman and naturalist, a founder of the Wildfowl and Wetlands Trust and the World Wide Fund for Nature (3,5,5) |
| PETER | Artist, yachtsman and naturalist, a founder of the Wildfowl and Wetlands Trust and the World Wide Fund for Nature (3,5,5) |
| SCOTT | Artist, yachtsman and naturalist, a founder of the Wildfowl and Wetlands Trust and the World Wide Fund for Nature (3,5,5) |
| CHARLESDARWIN | British naturalist whose portrait appeared on the back of the paper £10 note from 2000 to 2018 (7,6) |
| ASHMOLE | English antiquary and writer on alchemy, whose collection formed the basis for museum in Oxford |
| SWAN | A waterfowl with a species named after an engraver and naturalist who created the Chillingham Bull woodcut; or, a literary word for a bard/poet (4) |
| BANKS | Joseph ?, British explorer and naturalist elected president of the Royal Society in 1778 (5) |
| INFINITE | "The power of the imagination makes us ___": author and naturalist John Muir (8) |
