First Clen/T3 Cycle, Change Diet?

Hello, so im going on my first clen/t3 cycle, and theres only one thing i would like to know… i know the exact dosages im taking im doing the 2 week on 2 week off protocol with clen, but knowing that t3 is very catabolic, i am unsure of what to do with my diet… you see when i need to lose weight, the only way i can actually lose weight is if my i diet at around 2000kcal or below, my metabolism has always been naturally slow, so if i add clen and t3, what should i do exactly? should i eat 2000 kcal or should i eat more?? im trying to get very lean… Some advice would be great… thank you