Feature of this puzzle's theme answers?

Question:

Length:

Similar Crossword Questions:

Weather Channel feature (it's the puzzle theme found in a quintet of answers)
Picnic serving, and when divided properly, a hint to a hidden feature of six pairs of puzzle answers
Wee hr., and a hint to a feature common to this puzzle's four longest answers
They swing up and down in this puzzle's theme answers
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New element whose name will be ratified in January, 2010, and whose symbol appears in the middle of this puzzle's theme answers
"The wart stops here" product, and a hint to the theme found in eight puzzle answers
Out of whack, or what's featured in each of this puzzle's theme answers
Radio studio feature, and what each of this puzzle's four other longest answers literally is
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Feature of this puzzle's three long Down answers
TV feature, and a clue to six other answers in this puzzle
Theme of this puzzle hidden in the seven other longest across answers
What one gets by multiplying the numbers in this puzzle's theme answers
Choice words swapped in this puzzle's theme answers
Agent "embedded" in this puzzle's theme answers
Number inaugurated into this puzzle's theme answers
Bit of footwear that appears at both ends of this puzzle's theme answers
Supplements added to each of this puzzle's theme answers
Each of the titles in this puzzle's theme answers, e.g.
Alternative words used as alternatives for each other 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)
Reverend whose name is linked to terms like "Pazz and Jop," and this puzzle's theme answers
Time to feature any of the three theme answers?
This puzzle's theme found in the answers to five asterisked clues