Related Clues:

• Basic canine command
• "Please, make yourself comfortable"
• Pose, perhaps
• Park your carcass
• Do a typical teenager's job
• Sit for a shooting
• Put down a can?
• What people often do for pictures
• Order to Rex
• Sit for a shoot
• Portraitist's request
• Dinner table command, with 'up'
• Sit for a portraitist
• "Hey, down in front!"
• One may be assumed