Possible Clues:

• A nothing for dyeing?
• Michael Ondaatje novel, "___'s Ghost"
• Albert went round Ulster plant
• Kapoor of “Slumdog Millionaire”
• Indigo plant or blue dye obtained from it
• Shrub yielding an indigo dye
• As dye plant, use some vanilla
• Get advanced nothing for shrub producing wrong colour here
• Shrub used in dyeing
• Dye second piece of tapestry for nothing