I agree that the exercises already mentioned will develop the muscles in the legs, glutes, and hips. Squats, lunges, curtsey lunges, and side to side stepping with a band looped around the ankles will develop those muscles. However, in order to see the fat loss around that area, it should also be combined with a clean, healthy diet and some cardio (such as high intensity intervals). Genetics may also be a factor that could make it a little more difficult, but all of the above will help.
Hope that helps.