I retire from this puzzle, defeated only by 2d (A*I*L), baffled by some of the wordplay, and unable to 'rebuild' 19d. I wonder how many southerners have heard of, let alone visited, the rebuilt versions of 15d and 4a.
Clues like 8d are unfair. The solution hasn't been absorbed into English. We puzzlers would all cry foul if an answer was an obscure Hungarian, Tagalog, Albanian, etc word or phrase.