Possible Clues:

• Do something without spending enough time, trouble or materials
• Stint on
• Some task I'm prepared to economise
• Try to economise with green director sequestering millions
• Tighten your belt in spring, saving money
• Limit in quality or quantity
• Expend less in an attempt to economise
• Avoid investing money? Avoid spending it, too!
• Spend not enough time and care on (job)
• Thumb through Chapter 4: 'Cut Costs'