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All answers having "Minimal" as clue:

3 Character Answers:

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FEW

LOW



4 Character Answers:

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AFEW

BARE



5 Character Answers:

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BASIC

LEAST

SCANT

TOKEN



6 Character Answers:

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ABITOF

BAREST

MEREST

SCANTY

SLIGHT



7 Character Answers:

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ANOUNCE



8 Character Answers:

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MARGINAL

SMALLEST