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All answers having "Devotee" as clue:

3 Character Answers:

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FAN

IST

ITE

NUT



4 Character Answers:

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BUFF



5 Character Answers:

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FIEND

HOUND

LOVER



6 Character Answers:

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ADDICT

ADORER

VOTARY

ZEALOT



7 Character Answers:

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ACOLYTE

ADMIRER

BOOSTER

FANCIER



8 Character Answers:

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ADHERENT

IDOLATER



10 Character Answers:

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AFICIONADO

ENTHUSIAST