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All answers having "Egg-shaped" as clue:

3 Character Answers:

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MAN



4 Character Answers:

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EDGE

GOUT

OOID

OVAL

SHOO



5 Character Answers:

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OVATE

OVOID



6 Character Answers:

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ODOURS



7 Character Answers:

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LEGIBLE

OVIFORM

OVOIDAL

STERNUM



8 Character Answers:

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ELLIPTIC