Related Clues:

• ), when it follows :-
• Jack-o'-lantern look
• Obey the photographer, perhaps
• Unexpected mug shot feature
• The ")" in :-)
• Photographer's prompt
• Display that you're happy
• Happy reaction
• Welcoming expression
• Cheshire cat's signature feature
• Guilt-ridden missing Luddite with broad smile
• Winning look
• It’s often sheepish
• Cheese alternative?
• Expression in a dentist's ad