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All answers having "Outstanding" as clue:

3 Character Answers:

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ACE

DUE

FAB

RAD

RHO



4 Character Answers:

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AONE

OWED

STAR

TOPS



5 Character Answers:

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APLUS

GREAT

OWING

SMASH

SOCKO

STEAC

SUPER



6 Character Answers:

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BANNER

SELECT

SIGNAL

SUPERB

UNPAID



7 Character Answers:

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AWESOME

EMINENT

ISRAELI

NOTABLE

OVERDUE

PALMARY

SALIENT

STELLAR

WAYCOOL



8 Character Answers:

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ESPECIAL

UNREPAID



9 Character Answers:

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EGREGIOUS

EXCELLENT

EXEMPLARY

PROMINENT

REDLETTER



10 Character Answers:

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FIRSTCLASS

PREEMINENT



11 Character Answers:

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SUPERLATIVE



13 Character Answers:

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DISTINGUISHED

EXTRAORDINARY