I can't find a clone, but here is a start from their website.
"Bold, yet smooth! Fermented with dates and figs, this bone-crusher has a completely unique flavor.
Dogfish head uses a lot of sugar in their big beers, normally fed to the beer over the course of fermentation. I would start with a nice strong brown ale around 1.110, then feed it the sugar and dried fruit to hit your gravity. Here is a similar base beer I did based of Lost Abbey's Angel's Share: http://madfermentationist.blogspot.c...arleywine.html
I didn't add much sugar or the fruit, but I did add some liquor soaked oak cubes
If your primary ale yeast struggles you can either go with White Labs Super High Gravity or some wine yeast.
Sorry I can't be more specific than that, but it might help some.