| BIGBANGTHEORY | Hypothesis of the origin of the universe (3,4,6) |
| GAIA | Earth goddess whose name, at the suggestion of William Golding, was applied by James Lovelock to a hypothesis of self-regulation (4) |
| BAH | Characters disturb a hypothesis of contempt, in a manner of speaking (3) |
| MOTH | Test initial hypothesis of garden tiger, for example (4) |
| GAMOW | Who (George ___), with Ralph Alpher and Hans Bethe, developed the "big bang" theory of the origin of the universe? (5) |
| HOYLE | English astronomer who rejected the "Big Bang" theory of the origins of the universe, d. 2001 (5) |
| COSMOLOGIST | Student of the origins of the universe (11) |
| DARWINIAN | Relating to the theory of the origin of the species (9) |
| BIRTHPLACE | The only place for new deliveries of The Origin of the Species (10) |
| DARWINITE | Advocate of the theory of the origin of species (alt. sp.); Wide train (anag.) (9) |
| ETYMOLOGY | The study of the origin of words (9) |
| BANG | Onomatopoeic word for an explosion, such as the cosmic example hypothesised to have marked the origin of the universe (4) |
| SMATTERING | Superficial knowledge of The Origin of Species making a difference? (10) |
| SIGMA | Greek version of The Origin of Species |
| PLUNDERERS | Concealers of the origin of dirty money (10) |
| BIGBANG | A theory about the origin of the universe (3,4) |
| 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) |
| CLOGS | Dancing in what type of shoes was one of the origins of tap dancing? (5) |
| COSMOLOGY | The philosophical study of the origin and nature of the universe (9) |
| ARENDT | Hannah ___, author of The Origins of Totalitarianism (1951) (6) |
