What this puzzle's theme answers contain (if you look closely enough)

Question:

Answer:

SUBLIMINALADS

Length:

Similar Crossword Questions:

Alternative words used as alternatives for each other in this puzzle's theme answers
Weather Channel feature (it's the puzzle theme found in a quintet of answers)
Attendance check, and a hint to the puzzle theme in the first words of the starred answers
What the self-contradictory words found in this puzzle's theme answers are examples of
What the puzzlemaker did to the name in each of this puzzle's theme answers?
What each completed pair of theme answers in this puzzle is
Characters who "haunt" this puzzle's theme answers
Out of whack, or what's featured in each of this puzzle's theme answers
"Something you would cheat on if you knew you wouldn't get caught." "___" (also, the source of this puzzle's theme answers)
Like the theme answers in this puzzle?
Word before the first word in this puzzle's theme answers
Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)
Shade from the sun that's inserted in this puzzle's theme answers
Reservoir, and hint to puzzle theme found in seven long answers
Structure of this puzzle's theme, hidden in five answers
Equipment for each of this puzzle's theme answers
Agent "embedded" in this puzzle's theme answers
Compound found in perfume and this puzzle's theme answers
___ to school . . . or a hint to the puzzle theme suggested by the ends of five answers
Element of surprise in this puzzle's theme answers
Environmental slogan, or a hint to this puzzle's theme answers
Number inaugurated into this puzzle's theme answers
What one gets by multiplying the numbers in this puzzle's theme answers
Comic that comes to an end on October 3rd, and whose catchphrase ends this puzzle's theme answers
Supplements added to each of this puzzle's theme answers