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All answers having "Lustrous" as clue:

5 Character Answers:

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NITID

SHINY

SILKY

SLEEK



6 Character Answers:

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AGLEAM

GLOSSY

PEARLY

SATINY

SHEENY

SILKEN



7 Character Answers:

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SILVERY



8 Character Answers:

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GLEAMING



10 Character Answers:

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IRIDESCENT



13 Character Answers:

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REVOLUTIONARY