| GYROCOMPASS | Device which indicates direction by the freely moving axis of a rapidly spinning wheel, instead of using magnetism (11) |
| THAUMATROPE | Optical toy in which pictures on either side of a rapidly rotated card or coin appear to merge into one; from Greek, 'wonder turning' (11) |
| METRONOME | Mechanical device which indicates the exact tempo of a piece of music by producing a clicking sound (9) |
| IPODS | Bygone devices that had click wheels instead of touch screens |
| PULSAR | Rapidly spinning neutron star formed from a supernova |
| ACTIVE | A civet in the wild is freely moving? (6) |
| SYNOVIAL | ___ fluid lubricates freely moving joints |
| RACHIS | Whether referring to a backbone, a blade of grass, a feather shaft, a floral stem or the axis of a compound leaf, Greek "spine" is the unifying term (6) |
| STOPBIT | In asynchronous data transfers one of a pattern of data which indicate the end of a character or of the whole transmission. (4,3) |
| SPINNER | Folk name for a nightjar; a trout lure; a rapidly rotating cricket ball delivered by a bowler of the same name; or, a whirligig (7) |
| MOVE | Inspire change of direction by the bishop on the board (4) |
| STEM | The main axis of a plant which bears the leaves and flowers (4) |
| GLISSANDO | A rapidly executed series of notes on the harp or piano, each note of which is discretely audible |
| ADDLEHEADED | Confused, a divine took direction by the French (5-6) |
| SCARLETCUP | Saucer-shaped red fungus, common in the Northern Hemisphere, which indicates the approach of spring (7,3) |
| WAGGLEDANCE | Flight pattern whereby a bee indicates direction and distance of key resources (6,5) |
| LAMBSTAILS | Hazel willows' springtime catkins or aments, jolly like wags of baby sheep, two idiomatic shakes of which indicates a very brief moment (5-5) |
| STEMMER | One who removes the ascending axis of a plant. |
| UTURN | A reversal of direction by a vehicle (1,4) |
| CROQUIS | French word, from "crunch, gobble", for a rapidly executed sketch or quickly "devoured" image of a model (7) |
