2👍
You should get an instance of dxPieChart and call a method of this instance like this:
$(".chart").dxPieChart('instance').clearSelection();
You can call this on some event such as button click.
On the other hand, if your goal is to de-select pie segment when user clicks this segment (which means toggle selection), you could change your click handler:
pointClick: function (point) {
(point.fullState & 2) ? point.clearSelection() : point.select();
}
I created this code based on javascript from this chart demo
Source:stackexchange.com