| CLOCKWORK | Inner workings of a device studied in horology; or, a novel by Philip Pullman (9) |
| OLDSCORE | Inner workings of a bygone GM vehicle? |
| SURGERY | The inner workings of a theatre (7) |
| TELESCOPE | Device studied and developed by Galileo and Newton |
| GLITCH | A sometimes starquake-induced change in a pulsar's rotational frequency; or, a temporary fault in the workings of a system (6) |
| ALE | Bitter, seeing inner workings of talent |
| MOVEMENT | Illusion or impression of motion in painting or sculpture; or, in horology, the internal wheelwork or calibre acting as a miniature engine in a watch or clock (8) |
| TIME | Concept measured in horology; or, a call or bell signalling the end of permitted drinking hours in a pub (4) |
| EBAUCHE | French term for a sketch or primary laying-in of an artwork's rough outlines; or, a basic or uncompleted watch movement in horology (7) |
| INNARDS | Internal workings of a machine (7) |
| FEUDALISM | Same fluid workings of a rigid social system (9) |
| WHEELS | Gears in horology; exercise devices for hamsters; or, discs of cheese (6) |
| PENDULAR | Peru, land perturbed about development in horology |
| MODEL | A representation, usually on a smaller scale, of a device, structure, etc (5) |
| GISMO | Wing is more than a bit of a device (5) |
| UPTIME | Time in service of a device |
| COMPONENTS | Integral parts of inner workings |
| BIOMECHANICS | The study of the workings of the movement of living organisms (12) |
| ANATOMY | A study of the internal workings of something (7) |
| MOUSE | Little time to take advantage of a device linked to a computer (5) |
