does clarified butter require refrigeration?
Clarified butter/ghee does not need refrigeration (though you can refrigerate it...it just gets very solid if you do). The pantry is fine. That's where I keep it, in a dark place...it stays semi liquid and ready to use.
I cant speak for how long it ultimately lasts, though it certainly lasts for the 4-6 weeks that elapses between the batches I make. It's usually used up by then.