Well, that wasn't much fun. As sudokulover said, a real slog, especially in that corner.
AJT, that must have been a breeze. What a coincidence re the cooker. ;-)
Down to one letter in 38d. Assume it's "n". "Blow upset"? Never seen it used as a noun, but Chambers has it.
Can anyone explain the "half" missing in 3d?