Possible Clues:

• This is the era of the common man - there's the rub
• The people's time? There's the rub!
• Parent's prudent manipulation
• That's Mother's wise man - there's the rub
• Nice rubdown?
• Intimation missing first sweetheart for a rub-down
• Mother's wise to get treatment
• Rub to relieve pain
• Large number with time to get therapeutic treatment
• Rubdown at a gym