Related Clues:

• Swiss trio?
• A lot of sissies?
• Curves in the road
• The end of class?
• Tricky turns
• The three in each of this puzzle's theme entries
• Lispers' challenges
• Snaky curves
• Some boxing punches
• Switchback features
• Certain turns
• Curved letters
• Snakes in the road?
• End of darkness?
• Sass, mostly