| CATALYST | A person who causes or promotes change by their input or presence in a situation (8) |
| ELEVATOR | Word for a muscle that raises; a shoe that heightens; one who boosts or promotes; or, a paternoster, such as Louis XV's "flying chair" or Willy Wonka's great glass lift (8) |
| BACKSWING | Action on course to promote change in voting habits |
| DATA | Input or output stuff |
| SABOTEUR | Person who causes malicious destruction (8) |
| AMANDINE | Sweet nut protein and its presence in a pit (8) |
| SUBPOENA | Writ commanding a person's presence in court under penalty (8) |
| MINNIVER | Maxine _, character who is struggling with Jeremy's presence in Hollyoaks (8) |
| CATACOMB | Cemetery is about a cold presence in the grave (8) |
| DESMID | Studied by a microscopist, a green alga whose presence in a pond, river or steam is often a bioindicator of fresh or unpolluted water (6) |
| BOATRACE | A tiny amount of evidence of pythonesque presence in Oxford-Cambridge competition (4-4) |
| ALARMIST | One who causes needless worry and panic (8) |
| SHEKINAH | The glory of divine presence in Jewish theology (8) |
| INDICATOR | A blinker; or, a species, such as the Adonis blue, barn owl, English bluebell, oakmoss or turtledove, whose absence, abundance or presence reflects a specific environmental condition in a habitat (9) |
| ESTRANGE | Gets near to what those who cause disaffection do (8) |
| IRON | Element "Fe" whose presence in a shooting star causes the latter to emit a yellow light as opposed to the violet glow created by calcium or the blue-green of magnesium (4) |
| FLY | A fast stagecoach; a familiar spirit; a fishing lure; a flap, such as a tent-door or zip cover; or, a dipteran whose figurative presence in ointment alludes to a small but irritating flaw (3) |
| GREMLINS | Mischievous sprites who cause mechanical problems |
| WREAKERS | Ones who cause havoc |
| AROMA | A warm presence in a welcoming kitchen: quintessential Tara (mother), full of love (5) |
