From my own experiences you can either add mass or lose fat....in order to burn fat, you need to burn more calories than you ingest...in order to gain mass you need to ingest more calories than you burn....it is as simple as that, so not to be discouraging, but it is basically not gonna happen if you plan on bulking up and getting lean at the same time....I nunderstand what you mean though, and it is possible to eat a lot of clean calories and cut out the shit to change your body composition and gain muscle mass, but you cannot g for size and try to be shredded at once.....unless of course you consider AAS, but then there would have been no need for you to post this.