Then its time to learn some greco-roman wrestling. Thats wrestling based from clinching throwing. You need to focus on knowing where you are in the clinch, what your advantages are and how you can pummel to a better position.
This is the magic of MMA, you cant just perfect one aspect and its a pain to perfect all of it because its impossible. Its like playing paper rock scissors. Even the best can be beaten, for example Georges St Pierre just from one mistake.
Randy Couture does well in the UFC even at his age because he knows where he is in the cage, he knows what is best to do while there. Hey, one punch could change the whole fight sure, but its not that easy head hunting without having your head blown off at all

.