Possible Clues:

• Appearing distant in the past, runs in, causing mix-up
• Confused medley
• Hotchpotch or jumble, as of nonsense
• Most of litter involves a good mess
• Confused mess made by extreme right in the past
• Assortment of artillery taken in distant journey
• Removed scrap by old dog's dinner
• Mixed bag — for a rag (anag)
• Go long way with artist first in medley
• Mix of stuff from newspaper appearing in Portuguese resort