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All answers having "Down-to-earth" as clue:

3 Character Answers:

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RHO



4 Character Answers:

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REAL



5 Character Answers:

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BASIC



6 Character Answers:

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FOLKSY



8 Character Answers:

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SENSIBLE



9 Character Answers:

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PRAGMATIC

REALISTIC



10 Character Answers:

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HARDBOILED

NONONSENSE

REASONABLE



11 Character Answers:

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KITCHENSINK



15 Character Answers:

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MEATANDPOTATOES