Clen is not going to help take off a lot of weight.. Most people who use it are already fairly lean.. And if you're not dedicated in the gym I wouldn't mess with something that hardcore anyways.. I second the other advice, you need to get a good diet down. Not to many calories not to little.. Find a range where you can lose the weight at an acceptable pace. Only two ways to lose fat!!! Burn more calories than you take in, or take in less calories than you burn....
You come into the world weak, and you will leave the world weak. What you do in between is up to you!