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All answers having "Soap ingredient" as clue:

3 Character Answers:

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LYE



4 Character Answers:

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ALOE

TALC



5 Character Answers:

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BORON

OLEIC



6 Character Answers:

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OLEATE

POTASH

SLEEPY

TALLOW



7 Character Answers:

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OLEOOIL

PALMOIL

SODAASH

STEARIN



8 Character Answers:

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ALOEVERA



9 Character Answers:

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MELODRAMA