Related Clues:

• Root problem?
• Stay forever, as in jail
• Undergo decomposition
• Sit in a dump
• 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
• Start making a stink?
• Wood decay