Theme answers' commonality - Answers with 13 Letters

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Similar Crossword Questions:

Commonality of the theme answers
"Gosh!" (or, based on the starts of starred answers, one who is expert at solving this puzzle's theme?)
What the theme answers have in common
The pairs of letters inserted into each of this puzzle's theme answers, for example
Feature of this puzzle's theme answers?
When spelled out, word that follows the beginnings of the starred answers in a memorable kids' show theme song
Supplements added to each of this puzzle's theme answers
Term for each of the 15 asterisked theme answers in this puzzle
Numerator for this puzzle's theme answers
Big letters, for short (and what your answers must be written in to understand the theme)
Shoe additions, and what this puzzle's theme answers contain
New element in each of this puzzle's theme answers
What the puzzlemaker did to the name in each of this puzzle's theme answers?
Rumored reason for the stock market plunge of 5/6/10, whose effect is seen in this puzzle's theme answers
This puzzle's theme found in the answers to five asterisked clues
1997 Kevin Kline film, and a hint to the puzzle theme hidden in four answers
Letters for the names "buried" in this puzzle's theme answers
Number inaugurated into this puzzle's theme answers
One way to describe the theme answers?
Announcement/event of September 2011, or what happened to the theme answers
Commonality of seven answers in this puzzle
What the theme answers can do
Second letters of this puzzle's five theme answers (seen in order)
It may be involved in tallying the four theme answers
Where one might see the sounds embedded in this puzzle's theme answers