Place it in grit or something else that won't retain water, keep it warm, and give it a spray every week or so. It should root within a month at this time of year. If not, it might wait until spring. It will probably wrinkle, but that's normal over winter anyway, don't try to water it until it has roots.

Many thanks, snb. Fortunately, I "blindly" did just what you now advised!

Xuan