Possible Clues:

• On and on and on and on and …
• Using Latin to an offensive extent
• Over and over
• Sickeningly
• Amadeus, a name to conjure with excessively
• A design a man used too much
• What swing state viewers might experience as the presidential election draws closer, punnily, or a possible title for this week's puzzle?
• Sickeningly, to a classical extent
• ...and over in a Mitford-approved vein, on and on and on!
• Going on and on like this could make one sick