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All answers having "Indicate assent" as clue:

3 Character Answers:

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NOD

SIR



4 Character Answers:

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ERGO

TAUT



5 Character Answers:

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DODGE



6 Character Answers:

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TRIPOD



7 Character Answers:

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OVATION

TURFWAR



8 Character Answers:

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BROCCOLI



9 Character Answers:

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BEDFELLOW

REPRESENT

SYNDICATE