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All answers having "Very unpleasant" as clue:

3 Character Answers:

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TOY



4 Character Answers:

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ICKY

REAP

UGLY

VILE



5 Character Answers:

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AWFUL

HAULS

NASTY



6 Character Answers:

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GROTTY

HOBNOB

HORRID



8 Character Answers:

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GODAWFUL

HORRIBLE



9 Character Answers:

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HARROWING

OBNOXIOUS