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All answers having "Wail" as clue:

3 Character Answers:

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CRY

SOB



4 Character Answers:

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BAWL

HOWL

KEEN

MOAN

YOWL



5 Character Answers:

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COMIC

SCROD



6 Character Answers:

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BEMOAN

CRYOUT

LAMENT

PLAINT



7 Character Answers:

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ULULATE