Possible Clues:

• Diagrams distributed round Rio, primarily, for carnival
• Drags Irma out for the carnival
• Carnival reached by drive over quarry roads, oddly
• The festival of Shrove Tuesday
• Tot knocked back before one has endless marijuana - some festival!
• Spoil artist in lodgings for carnival
• Celebration to show appreciation of artist, dividing spoils
• 'Laissez les bons temps rouler' time
• Fast prelude
• First spoil and dig the artists, then lent afterwards