Possible Clues:

• A zero given to this dyestuff
• The sort of nothing that would make one die, by the sound of it
• Indigo plant or dye
• Trouble surrounding new dye
• A love of indigo
• Indigo product
• A nothing to die for, by the sound of it
• Name hidden in "Can I leave?"
• Shrub graduate removed from boundaries of Asian capital
• Linda, not Dorothy initially mixing dye