Possible Clues:

• Drive leaderless Klingons, you might say, round the bend
• Drive up the motorway, darling - to America!
• Force ripping head from stubborn hanger-on, America
• Spur
• I am, darling, American - the driving force!
• Force moving something along
• This writer's favourite American force
• Thrust
• For incentive, this setter's preferred the Times?
• Energy breaks items up