Related Clues:

• Not stay all the way up
• Gp. twice headed by Ronald Reagan
• Lack muscle tone, perhaps
• Become droopy
• Mattress annoyance
• Go into a slump
• Up against it with this flop
• Feature of an old mattress
• Not look perky, say
• Yield to weariness
• Hang down loosely
• Sink under pressure
• Cause for plastic surgery, maybe
• Get less taut
• Deflate some