| FIANCHETTO | In chess, the development of a bishop by moving one square to a long diagonal |
| CHECKMATE | In chess, the winning position in which an opponent's king is under attack and unable to escape (9) |
| ABJURE | A bishop, by Roman law, has to recant |
| WALK | Move along by moving one foot after the other (4) |
| ROOT | Applaud what may be square to a mathematician (4) |
| HEP | Not square, to a "cat" |
| NOD | Say yes by moving one's head |
| SNOWANGEL | Design made by moving one's arms and legs |
| NODS | Shows approval by moving one's head |
| EDGE | Knife _, a critical point in the development of a situation, process of making a decision, etc (4) |
| SOHO | Area of London bounded by Oxford Street to the north, Regent Street to the west, Leicester Square to the south and Charing Cross Road to the east |
| STEP | A stage in the development of a tot (4) |
| ECTOPIC | Pregnancy resulting in the abnormal development of a fertilised egg outside the cavity of the uterus (7) |
| EPSON | Company that began with the development of a printing timer for the 1964 Olympics |
| CHARTISM | 19th century reform movement to record the development of a distinctive practice (8) |
| KING | The most important chess piece, able to move one square at a time in any direction (4) |
| PASCAL | SI unit of pressure, equal to one newton applied to an area of one square metre (6) |
| QUADRAT | A one-square-metre area of ground marked out for the study of animal and plant life (7) |
| EASED | Assisted the development of a seed? |
| FOSTER | Promote the development of a damp doctor? (6) |
