Related Clues:
- Interlocking machine part
- Machine shop tooth
- Tooth on a gearwheel
- ___ sci, college major related to psych
- Unimportant employee — good company at first
- Gradually increase, with 'up'
- Little part of a big wheel
- Rotating tooth
- Small part of a machine
- Device stopping backward motion
- Watch gear's tooth, e.g
- Increase incrementally, with "up"
- Small gear wheel
- Couple of scoundrels, second of which knocking out a tool
- It may be in the works