| ENGELS | Author of 1884's "The Origin of the Family, Private Property and the State" |
| FORTUNE | Great wealth; ample stock of money, property, and the like. (7) |
| BUDGET | A pouch or wallet originally, later the Chancellor of the Exchequer's annual statement, hence the showing of a battered red box as a gesture to the origin of the word in question (6) |
| TINTORETTO | Artist born Jacopo Comin who painted Finding of the Body of St Mark and The Origin of the Milky Way (10) |
| ADAMS | Astronomer who explained the origin of the Leonid meteor swarms, described the motion of the Moon and independently calculated Neptune's position, by mathematical rather than observational means (5) |
| LAPLACE | French mathematician and astronomer who formulated the nebular hypothesis concerning the origins of the solar system and who developed the theory of probability (1749-1827). |
| GREECE | Home to the poet Sappho and the island Lesbos, the origins of the words "sapphic" and "lesbian" |
| GAMOW | Who (George ___), with Ralph Alpher and Hans Bethe, developed the "big bang" theory of the origin of the universe? (5) |
| ALPHA | The first Greek letter that, with the second letter "beta", forms the origin of the name given to a system of letters we use to write (5) |
| BIRTHPLACE | The only place for new deliveries of The Origin of the Species (10) |
| THESTOA | Location where 51D of Citium taught, and the origin of the name for his followers |
| DARWINIAN | Relating to the theory of the origin of the species (9) |
| CHINOOK | Language of the Pacific Northwest that's the origin of the word "potlatch" |
| AUTOMATISTS | Le Refus Global (Total Refusal): Quebec artists (spelling anglicized here) of the 1940s such as Paul-Emile Borduas whose manifesto on culture is considered the origin of the Quiet Revolution |
| TRURO | Birthplace in Cornwall of actor Samuel Foote, whose loss of a leg in a riding accident is sometimes attributed the origin of the theatrical phrase "break a leg!" (5) |
| ELECTOR | Constituent parts of Creole embodied the origin of the tongue (7) |
| BIGBANGTHEORY | Hypothesis of the origin of the universe (3,4,6) |
| HOYLE | English astronomer who rejected the "Big Bang" theory of the origins of the universe, d. 2001 (5) |
| ALLEVIATE | "It is immoral to use private property in order to ____ the horrible evils that result from the institution of private property" (Oscar Wilde) |
| DEMIJOHN | French dame-jeanne is thought to be the origin of the name of what large bulbous bottle? (8) |
