The case is solved! Turns out the mystery buyer who recently doled out $21.5 million for a snazzy triplex penthouse at 108 Leonard in Manhattan’s Tribeca neighborhood is Alexandra Clancy, the widow of the late bestselling author Tom Clancy, who penned numerous spy thrillers ranging from The Hunt for Red October to Patriot Games. Elena Sarkissian of Douglas Elliman held the listing, with Dora Abril of Douglas Elliman repping the buyer.
Records show the seller was the…

