Possible Clues:

• Kneaded
• The population having got old - that's what the rub was
• Rubbed the right way?
• Manipulated mum's getting on with son at first
• Statistically manipulated a lot of people, like the old
• The service got 16 down - there was the rub!
• Therapeutically pummelled
• Rubbed, manipulated
• Worked the kinks out of, maybe
• Got a rubber to the old service (8)