With Var it is very important you eat enough protein...so make sure you do keep it up.
If you want any diet input, to help make the most of your cycle, post up a day's worth of food (with details!) and we can help tweak it.
Also, might be good idea to get BF checked pre-cycle and then trouhgout the cycle and post-cycle. That way, you get good data during the cycle to see if you should tweak anything throughout....by tracking progresss or plateaus.
Losing fat is primarily will be diet related. Var will help with gaining strength and muscle. BUT, you won't gain muscle (even on Var) without sufficient protein.
Also, keep in mind losing fat and gaining muscle is hard to do AT THE SAME TIME. Chances are, with the Var, you will do both, but to a lesser degree than if you did them separately.
I love Var....

What kind are you planning on taking?