Related Clues:

• Unnecessary cost
• Watermelon rind, e.g.
• Fail to use
• Stuff to discard
• Use unwisely
• 'What a ___!'
• It's thrown into baskets
• Use inefficiently, as time
• ___ management
• Useless venture
• Needless expenditure
• Coffee grounds and orange peels, typically
• Compost collection
• Compost heap detritus
• It may be radioactive