Okay, this is a bit of a different one. Think outside the box as it were. Hopefully one thing will lead to another.
I decided to just run with some of the punchier clues. Don't be distracted in thinking some of the more detailed clues are part of the meta. I'm most cases I just put in more stuff to give more information to obscure clues.
Oh, also don't concern yourselves with the two 15 letter entries. It would have been hard to place symmetrically holes in them and not have the symmetry force two letter words. When Crosshare filled them in I was pleased with the results. That's all.
Nudges: Okay, there are five ways of preparing eggs and each one leads to the next
The first way is "Scrambled", so something scrambled will be a clue to a second type of egg preparation
What looks like it could by an anagram and of what?
That leads to a third and a third to a fourth
The fifth and last say it can be taken from DINGS
Isn't the word "representative" weird in the last clue
LAISEZ and NEZ, aren't that difficult French. Do you really think I think you will need google to translate those?
Isn't there an egg method right in the grid under the vacuum?
SEEOVARY is an anagram of OVER EASY, so that's the second and it's a clue to the third.
Taking EASY= EZ there are four places in the grid with the letter EZ[*] and the spots above them spell SOUS VIDE.
SOUS VIDE literally translates to UNDER VACUUM. A HOOVER is a vacuum and under the entry HOOVER is POACHED just right out there bold as brass.
POACHED definition refers to something being stolen and taken away.
The last entry DINGS refers to the final way being taken (or poached) from the entry.
"Representative markings on a surface" is D(RAW)INGS and so the final method is: RAW