This puzzle is even cleverer in construction than it seems. If you haven't already done so, write out the 23 extra letters - in clue order - from the 'hidden consecutive jumble' clues and see the four words they spell.
I agree with Bootlebarth that it was a very cleverly constructed puzzle especially where the extra letters from the jumbles were concerned.
I suppose it would have been a perfect construction if the omitted letters had been 10 instead of 14, but that is being niggly and probably stems from having to helped over the line by an AB friend!