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All answers having "Applaud" as clue:

3 Character Answers:

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RHO



4 Character Answers:

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CLAP

HAIL

JEST

ROOT

TOWN

ZINC



5 Character Answers:

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CHEER

TUTTI



6 Character Answers:

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PRAISE



7 Character Answers:

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ACCLAIM

CLAPFOR



9 Character Answers:

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CLAPHANDS