Trying to understand preamble.
Clues are paired with a word from each swapped.
If there are two clues in a row or column, they are paired, I believe.
But when there is a single clue in a row or a column, they are paired with their symmetrically opposite clue?
For example 12a paired with 30a, 13a paired with 32a?
For down clues 3d paired with 14d and 5d with 23d?
Hnakir, I have a much more simple definition of 'adjacent', just the clues that are next to each other! So far that seems to be working, giving me letters, words. 1 A and 7 A have a swap, 10 A and 11 do too and so on.