Can an expert or someone with experience help?

I am 4’11, and I weigh 60 kg. I used to go to the gym consistently, and during that period I built a lott of muscle on my upper body, but not much on my legs, and now I am back planning on building my glutes and legs ONLY. Here’s the problem here! I have been eating around 1200 calories in order to cut down (lost 4 kg so far and believe it or not my maintenance caloric intake is 1500) Is it possible to grow my legs during a cut? another question is how do I rebuild lower body strength? My legs feel so frail and weak now after a while of taking meds. thanks!