Possible Clues:

• Provides alternative to Grease after the players produced something medicinal
• Players get disturbed about old treatment for internal problem
• But did Pollux take the medicine too?
• That should keep the runners running,and no doubt keep you in motion too
• This could get the wheels - and you - in motion
• Some help to clear out inside, or move furniture quietly?
• Oddly stoical about expression of alternative medicine?
• A nasty dose of wheel lubricant
• That will help to keep 20 across - and you too - in motion (6, 3)
• Purgative from African shrub