The eight longest answers in this puzzle each have 13 unique ones

Question:

Answer:

LETTERS

Length:

Similar Crossword Questions:

Call hidden in this puzzle's eight longest answers that's apt for May Day?
Ones in charge of a case ... or a literal hint to the eight other longest answers in this puzzle
Boat lifters found in this puzzle's three longest answers
Child in seven of this puzzle's longest answers
Words of reproach, and a hint to how the four longest puzzle answers are formed
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Place to live, one of which starts the three longest puzzle answers
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They're hidden in this puzzle's nine longest answers
Letter that begins and ends this puzzle's six longest answers
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Commercial interruptions literally found in this puzzle's three other longest answers
Stone that's "cut" in this puzzle's four longest answers
Elite Navy group that's fittingly camouflaged in the four longest answers in this puzzle
Govern, or word that can follow the first word of the four longest puzzle answers
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Place to live (different ones are hidden in this puzzle's four longest answers)
Important trial figure, or what you'll be when you read this puzzle's other four longest answers
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Instantly ... or how this puzzle's other three longest answers came about?
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Discussion group, and a word that can follow the ends of this puzzle's five longest answers