Possible Clues:

• Around the North a pound could make a shade of difference
• Shrub graduate removed from boundaries of Asian capital
• A love for deep blue
• By the sound of it, this might die for a shade of a nothing
• It seems a nothing could make it die, by the sound of it
• That's a nothing to die for, by the sound of it
• AO till all is blue?
• A zero given to this dyestuff
• Seems a nothing will make it die, by the sound of it
• The sort of nothing that would make one die, by the sound of it