I've completed the grid except for the top and bottom rows and 10d. Am I right in assuming that the italic parts of the preamble are clues to the blank rows? I know 10d won't make sense but there must a logical way of deducing the uncrossed cells.
When I got 21a and 29a I almost stopped there and then because I've known puzzles with the same theme in previous years that just lead you up the garden path, so I'm hoping this one won't turn out to be a waste of time.