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All answers having "Fighter" as clue:

3 Character Answers:

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EAR



4 Character Answers:

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WHAT



5 Character Answers:

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ENEMY



6 Character Answers:

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THRONE



7 Character Answers:

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BATTLER

WARRIOR



8 Character Answers:

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DUELLIST

PUGILIST



9 Character Answers:

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COMBATANT