Related Clues:

• Give in to gravity
• Sign of aging
• Memory failure
• React to gravity
• Come to an end, like a subscription
• Lose tautness
• Sink in the middle
• Become weary
• Need renewal
• Lose tautness, in a way
• Yield to gravity
• Lose oomph
• Fall down
• Instance of zoning out
• Regress