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All answers having "Bell sounds" as clue:

4 Character Answers:

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TIGS



5 Character Answers:

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BONGS

DINGS

DONGS

PEALS

TINGS

TKLES



6 Character Answers:

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KNELLS



7 Character Answers:

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TINKLES



9 Character Answers:

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DINGDONGS



10 Character Answers:

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TINGALINGS