enigmatic puzzle - A Message to the SE Admins

We're graduating! I feel the only appropriate way to respond is a Stack Exchange themed puzzle:

• Albertan politician who succeeded Lucien Maynard (6, 7 or 6, 8)


• 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)


• Pigment made from antimony (6, 6)


• Rapper or theater worker (5)


• Revealed or exposed - what the Scooby-Doo gang did to the villain of the week (both literally and figuratively!) (8)


• Voice of Carl from Up (2, 5)

What's my message to the SE admins? You'll know it when you find it.

Answer

The message for the SE Admins is:

Thank You!

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)

Arthur Soetaert

Approved for passport authorization (6)

Visaed

Famous stage direction from The Winter's Tale (4, 7, 2, 1, 4)

Exit, pursued by a bear

Method of hiding messages undetected inside images, audio, or text (13)

Steganography

Pigment made from antimony (6, 6)

Naples yellow

Rapper or theater worker (5)

Usher

Revealed or exposed - what the Scooby-Doo gang did to the villain of the week (both literally and figuratively!) (8)

Unmasked

Voice of Carl from Up (2, 5)

Ed Asner

All of these answers have

the pattern S?E in them with a letter replacing the question mark. If you rearrange them by the position of S?E you get...

 STEGANOGRAPHY
 USHER
 VISAED
 EDASNER
 UNMASKED
 NAPLESYELLOW
 ARTHURSOETART
 EXITPURSUEDBYABEAR
 

Then just read the letters in between and you get "THANK YOU"!