The message for the SE Admins is:
This can be found by looking at something hidden in the answers to each of the clues:
Albertan politician who succeeded Lucien Maynard (6, 7)
Approved for passport authorization (6)
Famous stage direction from The Winter's Tale (4, 7, 2, 1, 4)
Method of hiding messages undetected inside images, audio, or text (13)
The phrase "in ads" likely means "in advertisements", where you are paying for character space. This suggests "eves" is an abbreviation, and that the answer will also be an abbreviation. EVE is an abbreviation for evening, and AFT is an abbreviation for afternoon, which comes before evening. Hence "AFTS" should be ...
The flavour text says that we're looking for something we've seen before "here". On this site?
Hint 2 says we should
The method, then is to
Solving the clues:
The extra letters spell
The final answer is
"Heir" is usually pronounced with a silent H, so sounds like "air".
One meaning of the word air is a melody, such as "air on a g string".
"We hear" is a common idiom in cryptic crossword clues for homophones ie "sounds like".
So "melody, we hear" = "sounds like another word for melody" = "sounds like air" = "heir".
Final (credit to @jafe and @Mohirl for figuring out the rest of the clues, go upvote them!)
Rogue tries to follow templar leader
Law breaking, tasteless, sandbox entry
Scientific premise around martian origin?
Not quite a rapper, weird kid
Man tossing bound article?
Beginner to Hero: The planet rocks
Fantasy's heart found in ...
That was a very, very nice puzzle! Solved this with a lot of help from @grc
Here's a step-by-step walkthrough of how we solved it.
Working out some clues
We figured that (#X of Y) probably meant that the clue answer had Y letters, and that we had to take the X-th letter later. Why some clues didn't have a #X we weren't sure, but the first clues we worked ...
I have so far solved about half of the "crossword" and it is clear that the answer is going to be
[EDITED after finishing it to add:]
And it does turn out that the regex clues alone are enough to nail it down, though I briefly thought they wouldn't.
Not that there's any extra information in it, but:
[EDITED some time afterwards because I noticed I'd ...
Broadly speaking, there are two styles of clues in British crosswords.
Ximenean clues (named after the pseudonym of Derrick Somerset Macnutt) adhere to a fairly strict recipe of [precise definition] + [cryptic indication], and are probably the sort of clues that American solvers would be most familiar with. For example:
• I feel wretched getting no Latin ...
Standing on the shoulders of several giants, I can gather a complete answer.
Let's first solve the cryptic puzzles:
Then fill the blanks of the non-cryptic puzzles with these, and solve them:
Finally her location is revealed by
to be the
Gladys is at
A part of the arm (5),
a continent's highest mountain (6),
an Australian capital (9),
a gardening tool (11)
A sea mammal (7),
an Egyptian riddler (6),
a form of carbon (8),
an online scamming technique (8)
Solved by Omega Krypton
A Himalayan city (5),
Viking afterlife (8),
hotheaded, reckless (9),
a maritime punishment (11)