Related Clues:

• Puts on the brakes
• Holds up
• Taps the brakes
• Comes to a snail's pace
• Loses velocity
• Prepares to stop
• Decelerates
• Taps on the brakes
• Delays
• Uses the brakes
• Does some rubbernecking, say
• Hits the brakes
• Puts on the brakes, e.g.
• Loses steam
• Moderates