I haven't heard of any way to store a clone, other than leave it on the plant for a while longer. I would love to find a way to do this, altho I don't think there is a way. Good luck in finding a way.
i seem to remember reading somwhere that you can put them in the produce drawer in the fridg, but i don't think you can do it for more than a a couple of weeks .. . let us know if you learn anything on this as i will be coming up with the same issue in a few weeks.
A clone is a living, breathing, plant. It relies on all six of the limiting factors to keep it alive and healthy. It can't be "put into storage" for any real length of time; it can merely be kept alive longer than it's natural, annual, cycle by artificial means. A mature "mother" plant can be kept in veg for a very long time. A seed is a potential plant in "storage", under the right conditions, seeds can be stored for several years - even decades. Anything that sounds too good to be true - probably is!!!