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All answers having "Fought" as clue:

4 Character Answers:

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VIED



5 Character Answers:

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BOXED

HADAT

WAGED



6 Character Answers:

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ARGUED

DUELED

STROVE

WARRED



7 Character Answers:

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BATTLED

HADATIT

MADEWAR

RASSLED

SPARRED



8 Character Answers:

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COMBATED

WRESTLED



9 Character Answers:

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DIDBATTLE

SAWACTION

STRUGGLED