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All answers having "Spring time" as clue:

3 Character Answers:

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CDT

MAY

RHO



4 Character Answers:

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JUNE

LENT



5 Character Answers:

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APRIL

MARCH



6 Character Answers:

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EASTER

MAYDAY



7 Character Answers:

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EQUINOX

MAYTIDE



8 Character Answers:

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PASSOVER



10 Character Answers:

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EASTERTIDE



11 Character Answers:

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RELEASEDATE



13 Character Answers:

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VERNALEQUINOX



15 Character Answers:

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OPENTOTHEPUBLIC