| CALCULUS | Some maths is heartless, wasting oxygen, taking copper (8) |
| DIVISION | What, in maths, is the operation inverse to multiplication (8) |
| RETINUE | Followers develop routine, wasting oxygen and energy (7) |
| SMASHHIT | Principle of homotopy in applied maths is a huge, widespread success (5,3) |
| FIDUCIARY | Involving trust if diary is involved, taking copper back (9) |
| CALCIUM | Still taking copper with iodine and another element (7) |
| GEOMETRY | Some maths got me agitated about energy lines (8) |
| SNOOKUMS | Honeybunch does some math around recess (8) |
| DISCLOSE | Reveal cad is heartless that's on record (8) |
| LADYSMAN | Youth is heartless? Yes, and worker is a flirtatious type! (4'1,3) |
| FLATTERY | Fay is heartless about the lastmentioned butter (8) |
| AMBIENCE | Vibe is heartless ambivalence (8) |
| VOLATILE | There it is, heartless, backward, the pick of society for the most part and highly strung (8) |
| ANTIHERO | Unconventional character in a new Herriot novel is heartless |
| ALGEBRA | Some maths to give a broken leg support (7) |
| ALGEBRAIC | Gangster throws big race, using some maths |
| ARITHMETIC | I teach trim jockeys some maths |
| TRIGONOMETRY | Get in room orderly and attempt some maths (12) |
| EUCLIDEAN | Like some maths idea uncle cooked up |
| MADDING | Hectic minutes followed by some maths (7) |
