Related Clues:

• Work on perfecting
• Perfect, as skills
• Rationalise current business
• Perhaps make driverless car with China's backing
• Get robots to do
• Sharpen, as a knife edge
• Speed up meal cooked and eaten by Aussie
• Sharpen, like a skill
• Sharpen (with a whetstone)
• Fine-tune over time
• Pre-programme car, 50% less consumed
• Perfect gradually
• Sharpen, like skills
• Improve through practice
• Sharpen, as an axe