Related Clues:

• Become compost
• Pigment
• Stuff and nonsense
• Turn blue, e.g.
• Turn green, say
• Stain's kin
• It won't run if it's fast
• Go blonde, say
• Degenerate
• ''Applesauce!''
• See 15 Down
• Turn red, say
• Hue changer
• Food coloring, e.g.
• Colouring agent