T3/4 compounds are not toys, and you should play with them, as they may have serious health consequences. Regarding Clenbuterol, it was not created for fat loss, and the dosages you need for this kind of effects are excessive, which leads the user to tons of side effects. Besides, both clenbuterol and T3 will eat up your lean mass too, not only fat. So you will be losing muscle mass together with fat, which is not cool. Better use something that was at least meant for this kind of purposes, such as Cardarine GW and N2Slin - these two compounds will only burn fat, while keeping, and even increasing your lean mass. They will not cause any side effects, and will bring along a lot of other cool benefits. So you make the choice here....at least now it will be an informed choice.