| LUCIFER | IBM created this algorithm, which was to become the Data Encyrption Standard (DES) in 1975. |
| CHIANG | In 1934 around 100,000 Chinese communists under the leadership of Mao Tse-tung retreated 10,000 km from the Nationalist Army of ... Kai-Shek in what was to become known as the Long March |
| THAWS | As role of Morse was to become in friendlier times? |
| QED | Abbreviation of a Latin phrase for "which was to be demonstrated or proved", used at the end of a formal proof and as the title of a former BBC science documentary series (1,1,1) |
| QUODERATDEMONSTRANDUM | Latin phrase meaning "which was to be shown", traditionally abbreviated at the end of a mathematical proof |
| CHE | Opponent of the Peron regime in Argentina, he left that country in 1952 and went on to become the revolutionary of the century, ... Guevara |
| ALCHEMY | Protoscience, one aim of which was to transmute base into noble metals (7) |
| QUOD | Heard child at start of statement which was to be demonstrated (4) |
| BIFF | Sound of a punch [E] {I created this puzzle for Take Your Kids To Work Day in collaboration with my then-nine-year-old twins. Clues followed by an [S] were written by Sid, and clues followed by an [E] |
| ARMSTRONG | Astronaut who commanded the space mission that enabled him to become the first person to walk on the moon (9) |
| CHERYL | Which singer rose to fame as a member of Girls Aloud and went on to become the first British female solo artist to have five No 1 UK singles? (6) |
| OPENAI | Artificial intelligence startup that SoftBank is heavily investing in, aiming to become the most valuable company in the world. (6) |
| THEUNIT | CBS drama co-starring Scott Foley (who co-created this puzzle), and a hint to puzzle theme that begi |
| FAMILYGUY | Seth McFarlane created this animated sitcom centred on a dysfunctional family who live in Quahog, Rh |
| POPPINS | PL Travers created this children's classic of the ideal nanny, Mary ... |
| MARY | PL Travers created this children's classic of the ideal nanny, ... Poppins |
| HEMAN | Former tennis player loses a point to become the most powerful person in the universe? (2-3) |
| BOBBYFISCHER | American Grandmaster who beat Boris Spassky in Reykjavik in 1972 to become the 11th World Chess Champion |
| COROLLA | Dating back to 1966, this Toyota went on to become the world's best-selling nameplate (7) |
| PATERFAMILIAS | I ape a film star in order to become the head of the household (13) |
