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

Question:

Answer:

LETTERS

Length:

Similar Crossword Questions:

Rap sheet letters hidden in this puzzle's longest answers
They're hidden in this puzzle's seven longest answers
Place where the starts of this puzzle's four longest answers result in a penalty
Regular stuff found inside this puzzle's three longest answers
Things hidden in this puzzle's eight longest answers
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It can follow the last word of this puzzle's five longest answers
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Workweek start, or an apt title for this puzzle based on an abbreviation found in its five longest answers
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Ones in charge of a case ... or a literal hint to the eight other longest answers in this puzzle
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Child in seven of this puzzle's longest answers
Words of reproach, and a hint to how the four longest puzzle answers are formed