Possible Clues:

• The Golden River is the way to sound perfumery
• Fragrant rhizome of Florentine iris
• Ingredient in perfume and potpourri
• Cockney bloke talked of fundamental perfume ingredient
• Norris loses the head on a bit of weed as Iris makes medicine
• Pulverized perfumery item
• Source of perfume or repeated riots for dispersal
• Perfumery fixative
• Perfume ingredient old bishop's returning? Too right!
• It smells of violets in Rio - or sort of!