From the main menu go to Options > Gameplay and from there scroll down and turn on Manual pit stops.
Now back out to the main menu and set up a custom race, preferably one with few laps and a fast car. Once you're racing (FP or Qualifying won't work), ask for a pit stop and when you come around enter the pits with a speed of 60 km/h. The pit limiter will automatically get engaged, so just taxi the car to your pit and stop in the box using your brakes.
Once you're ready to go, upshift to 1st gear holding the clutch in (if you're on automatic transmission you won't have to deal with this) and leave the pit lane. You'll pop the achievement once you're back out on the track.
See how you can unlock the following achievement at the same time: