Crystal Clear Out III is a mission given to the player in Grand Theft Auto Online.
Description[]
Whilst heavily implied it is a mission given by Trevor Philips, it is not offered via a phone message but started by walking into the blue corona (marked by a star icon on the player's radar) in the cul-de-sac Nowhere Road in Grand Theft Auto Online Freemode. The mission is available from 07:00 to 15:00.
This is one of six co-op "contact" missions not directly given by the contacts in GTA Online (including Coveted, Potshot, Crystal Clear Out II, Dirt Road and Coasting). It can be accessed immediately upon reaching the required Rank by the Start>Online>Jobs menu (PlayStation 3 and Xbox 360 only) or by walking into the job corona on the map (although the map coronas are limited by time of day).
The team have been instructed to take out the meth labs which the Vagos have set up around Sandy Shores. To do this the team must kill all 30 Vagos members who are at the sites.
The first two sites are close by each other. The first meth lab is south of Sandy Shores, and the other is just south of the first meth lab. The third lab is south of Grapeseed.
Once the team has wiped out all of the Vagos at all three meth labs, the mission is complete.