Work closely with your granite installer. And forget about attaching any mount clips to the granite; not a good idea.
Amer. Std, and Kohler, as well as some generics, make undermount bracket kits. These take the form of bars supported by the cabinet sides, or front-back. They and the sink are installed before the granite. Then after the countertop is on, adjuster screws snug the sink up to the countertop ( with a bead of caulk of course.) Very easy to do, sink is extremely secure, and the sink can be removed if necessary in the future without disturbing the top.