Related Clues:

• Sign of satisfaction
• Sign of amusement
• Cheshire Cat's expression
• Prankster's look
• Sheepish look, maybe
• Frown, upside down
• Ear-to-ear expression
• Mischievous expression
• Know-it-all's expression
• Unsportsmanlike look
• Boyish smile
• "... but a __ without a cat!": Alice
• Happy expression
• It may run from ear-to-ear
• Cat-who-got-the-canary smile?