Here's a great vid I like to refer people to when they start getting into clinching and understanding it's importance in MMA, Muay Thai and Self Defense. What you'll notice is use of the primary control points of the body. The Crown of the head, the neck, jaw, ears, shoulders, biceps and triceps, wrist, hips, knees, and ankles, using single and double neck ties, underhooks, overhooks/whizzers, bicep tie ups, along with great wrist and ankle control.
Stephan Kesting and his partner Ritchie Yip do a AMAZING job of going over the rematch between Antônio Rodrigo Nogueira and Frank Mir at UFC 140, including the amazing Kimura that ended the fight.
Learn and enjoy!