For this achievement you need to win a Marked Man event (Yellow icons) without being taken down by the chase cars.
Now you can however crash yourself and still get this as i crashed many times but was not taken down by the black chase cars.
The first Marked Man event located by Watt & Angus is the easiest to get this on as you need to head to the Navel Yard but there are numerous shortcuts that you can take that the chase cars do not.
Here's a video of my route.