Related Clues:

• Curved letters
• End of darkness?
• Sass, mostly
• Bendy letters
• Scrabble one-pointers
• Tough slalom curves
• Double-curve letters
• Mississippi has many of them
• Halves of a figure eight
• Curvy roads
• Senseless quartet?
• Sigmoid curves
• 19th letters
• Letters that create hurdles for lispers
• Squiggly shapes