It's a scam. Spot injecting clenbuterol won't make it burn fat specifically. As soon as you inject something, it is released into the blood stream and transported throughout the body. Clen has the same absorption if you take it orally or inject it. I would just use an oral research chemical form of clen. You can order it from ag-guys.com. Take it orally, make your life easier.
If you are looking for something to help reduce particularly stubborn body fat areas, look into a topical fat burner like yohiflame from n2bm.com.