If you knock that out of the pot and examine, you will find it has formed tubers. Either trim the top, shake the mix off and store the tubers in a paper bag over the winter or set the pot on its side under a bench and let it dry out and go dormant (like one would do with a tuberous begonia).
If you want to increase this clone, you can divide the tuber mass but make sure each tuber retains a bit of the stem base as that is where the new shoots form. You can also take cuttings, but I think you will have the greatest success doing so when the plant starts to regrow at the beginning of the growing season rather than now when it is winding down into dormancy.
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