You could try something like follows:
private void RadButton_Click(object sender, RoutedEventArgs e)
this.clubsGrid.Columns.IsReadOnly = false;
this.clubsGrid.CurrentColumn = this.clubsGrid.Columns;
However, if you want to return the read-only state of the column, you need to handle CellEditEnded event for example and change the IsReadOnly property of that column back to "True".
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