Related Clues:

• "Bah!"
• Root problem?
• Stay forever, as in jail
• Undergo decomposition
• Sit in a dump
• 'Rubbish!'
• Start to smell, maybe
• Problem affecting old lumber
• Turn rancid
• Become moldy
• Nonsense, to a Brit
• Turn into compost
• It befalls fallen fruit
• Turn for the worse
• Degenerate badly