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All answers having "Continuous" as clue:

4 Character Answers:

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MEAN



5 Character Answers:

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SOLID



6 Character Answers:

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ENTIRE

STEADY



7 Character Answers:

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ENDLESS

NONSTOP

ONGOING



8 Character Answers:

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CONSTANT

SEAMLESS

UNBROKEN

UNENDING



9 Character Answers:

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INCESSANT

PERPETUAL



17 Character Answers:

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UNINTERR{UP}{TED}