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All answers having "Oscar winner" as clue:

4 Character Answers:

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GREY

IVES

STAR



5 Character Answers:

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DONAT

MARTY

NIVEN



6 Character Answers:

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BOGART

BRANDO

DENIRO



7 Character Answers:

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BENICIO

BRYNNER

MAGNANI



8 Character Answers:

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BORGNINE

CHRISTIE

DRESSLER

FONTAINE

GUINNESS

LAUGHTON

MCLAGLEN

MINNELLI



9 Character Answers:

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PRESENTEE



10 Character Answers:

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BLESTACTOR

HELENHAYES

JOSEFERRER



11 Character Answers:

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ALLABOUTEVE

OUTOFAFRICA



12 Character Answers:

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SOUNDOFMUSIC

THEAPARTMENT



15 Character Answers:

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CINEMATOGRAPHER

COSTUMEDESIGNER

SUPPORTINGACTOR



22 Character Answers:

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AROUNDTHEWORLDIN8ODAYS