| Answer | Crossword Clue |
|---|---|
| SERVO | Self-correcting system |
| FEEDBACKLOOP | Self-correcting circuit |
| MAINTENANCEFREE | Self-correcting or self-cleaning, say |
| JUDO | Self-defense system |
| KARATE | Self-defense system |
| KARATE | System of self-defense |
| TAI | ... chi (self-defense system) |
| KARATE | System of unarmed self-defense |
| HERTZ | Drive-Ur-Self System company, now |
