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All answers having "Excursion" as clue:

4 Character Answers:

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RIDE

TOUR

TREK

TRIP



5 Character Answers:

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JAUNT

SALLY



6 Character Answers:

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BEACON

NATURE

OUTING



7 Character Answers:

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GRUMBLE



8 Character Answers:

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ENTREATY

SIDETRIP



10 Character Answers:

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DILLYDALLY