Learn to wrestle.
Learn to grip fight.
Learn to hand fight.
Learn to neck wrestle.
All of these will teach you how to deal with a clinch. Giving a specific technique is kind of pointless. The clinch is wide ranging, the variations subtle and intricate in both application and defense. It is arguably one of the most technical skill sets and ranges in a fight.
"In the world of martial arts, respect is often a given. In the real world, it must be earned."
"A stupid man's report of what a clever man says is never accurate because he unconsciously translates what he hears into something he can understand. "--Bertrand Russell
"Liberals - Cosmopolitan critics, men who are the friends of every country save their own. "--Benjamin Disraeli
"A conservative government is an organised hypocrisy."--Benjamin Disraeli