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All answers having "Sweetie" as clue:

3 Character Answers:

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BAE

BOO

HON

LUV



4 Character Answers:

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AMIE

BABE

BEAU

DEAR

DOLL

LAMB



5 Character Answers:

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ANGEL

CHERI

DEARY

FLAME

HONEY

LOVEY

SUGAR

TOOTS



6 Character Answers:

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DEARIE



7 Character Answers:

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PETNAME



8 Character Answers:

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CUTIEPIE

HONEYBUN

HONEYPIE

SUGARPIE



9 Character Answers:

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BABYCAKES

VALENTINE



10 Character Answers:

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HEARTTHROB

HONEYBUNCH