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All answers having "Curtain material" as clue:

3 Character Answers:

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NET



4 Character Answers:

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IRON

LACE

LENO



5 Character Answers:

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NINON

SCRIM

VOILE



6 Character Answers:

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BAMBOO

CHINTZ

CRETON

DIMITY

MADRAS



7 Character Answers:

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ETAMINE

NETTING

ORGANDY



8 Character Answers:

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ASBESTOS

CRETONNE