Hi Kelley,
My right thigh is also about an inch bigger than my left. Are you right-sided? What I mean is, are you right-handed and do you perform most of your actions with your right side? If so, this is what is called your dominant side - the side you use the most, and as result will be stronger (and often, bigger) than the left (or vice-versa). A personal trainer recently told me that we all have a dominant side and that this side would be bigger than the non-dominant side. She suggested that I work my NON-dominant side FIRST in all the activities that I do. So, whenever I reach for something, fill the kettle, pick something up, I now always try to use my left side (my non-dominant side) instead. When I am working out, I always work the left side before the right. This (apparently) will help to redress the imbalance. I have only recently adopted this approach (this is also the approach used in the new Fitprime videos) so it is too early to tell if it works. However, I did make a note of my measurements before I started so that I can check them later to see if there is any difference.
I, like you, am carrying extra fat, which I hope to lose as a result of clean eating and exercise. As you lose weight/fat, your thighs will naturally reduce anyway, so this may take care of the problem in part.
The other thing to csonsider is the "genetic" factor. It may be that one side of your body will always be slightly bigger than the other, even when you are at optimum weight and fitness. However, it may be useful to think about it like this: rather than concentrating on reducing your right thigh, try to concentrate on building more lean muscle in your left thigh by working this side first.
I'm sure you will receive suggestions from others, but I hope this helps. Good luck!
Kaz.