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All answers having "Edible crustacean" as clue:

4 Character Answers:

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CRAB



5 Character Answers:

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PRAWN



6 Character Answers:

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SHRIMP



7 Character Answers:

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GENERAL

INSIGHT

LOBSTER



8 Character Answers:

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BRACELET

CRAYFISH



12 Character Answers:

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BALANCESHEET



13 Character Answers:

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CREMEDEMENTHE