Related Clues:

• Become a bit deflated
• Go south, as sales
• Get old, as a roof
• Bend in the middle
• React to humidity, in a way
• Hang downwards, lose strength or spirit
• Droop, sink
• Droop in the middle - it's gas
• Droop, sink in the middle
• Give way under pressure
• The number upon this is twelve
• This will go down, go back and go up
• It may go down, go up and may go off
• This will go down, but it could be great when it comes back up
• Go down, turn up and go up