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All answers having "Speech" as clue:

3 Character Answers:

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LIP

RAM



4 Character Answers:

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HATE

TALK



5 Character Answers:

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HABLA

LINGO

VOICE



6 Character Answers:

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SERMON



7 Character Answers:

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ADDRESS

DIALECT

LECTURE

ORATION

PALAVER

RISOTTO



8 Character Answers:

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LANGUAGE

PARLANCE



9 Character Answers:

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UTTERANCE