Possible Clues:

• Putting many skirts on - all red
• See, the ruddy edge is on it
• Trick with lips is getting right shade of red
• Embarrassment caused by colour? No, the reverse
• Shade - see the edges on it
• Red for offences that are pointless continuing
• Swindler tours the borders of Modena
• Colour to paint borders in study?
• Showing deep embarrassment
• Wallace's circle