I got back to biking a bit over a year ago. I saw right away I had no ability to spin in circles. I could do it for just a few minutes and it made my legs tired after that. But having been a cyclist years ago I knew its importance and I just kept working at it, consciously each ride here and there. It took a full season and more for me to get to the point where now I am spinning pretty much all the time. Spin in circles till it's tiring. Ride. Spin again. Mash. Spin whenever you can. Keep working at it consciously. +1 on spinning classes and short bursts of ultra high speed spinning. It may take quite a while to get it under control because the leg muscles used aren't balanced for spinning by normal walking, but it will come after some hundreds of miles.