Possible Clues:

• Suspense killer
• '15-Down is TAT,' e.g.
• News story published to ruin another
• "It was a dream," say, for a movie
• Ralph Nader in the 2000 election, according to Gore supporters
• Third-party candidate, perhaps
• Device on plane or vehicle to slow it down (7)
• Flap with second tanker coming under pressure
• Sporty auto option
• Device which improves car's roadholding at speed