Related Clues:

• Failed to participate in (with "out")
• Served, as on a committee
• Obeyed "Down in front!"
• Was in session, as Congress
• Sank into the sofa
• HS senior's exam
• Sr.'s challenge
• Didn't move, as a product
• Took weight off one's feet
• Didn't get snapped up, say
• Convened, in a way
• College Board creation
• Tended little ones
• It may be used for Mensa admission
• Rested nearly half a day