Possible Clues:

• It's no good just advising economy
• Vain plea from conservationists
• It's no good at all just to encourage people to economise
• No good to be minus 17 across
• Kaput
• Of no practical application, not worth keeping
• Vain appeal to wanton consumers
• You save more if it's no good
• Unemployable
• If the pause were like this, no good, it would do for Pa