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All answers having "Fit of temper" as clue:

3 Character Answers:

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PET



4 Character Answers:

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RAGE

SNIT



5 Character Answers:

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ANGER

GHOUL



6 Character Answers:

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ANNUAL



7 Character Answers:

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DEADPAN

TANTRUM

UNICORN

WHIMPER



12 Character Answers:

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INSTRUMENTAL