Possible Clues:

• Philosopher with authority becomes factory designer
• Local fight with head is advantageous to a factory worker
• Power clamps will, when adjusted by right craftsman
• Factory engineer's the perfect husband, taking sick wife for first run!
• Worker brought in if things grind to a halt?
• Maker of machinery a philosopher? Yes, we hear
• Economist accurate, said builder of Tulliver's place
• Builder, philosopher and aviator