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All answers having "C-A-L-L-___" as clue:

3 Character Answers:

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ATT

CRY

LOG

REF

RHO

SEE

UMP



4 Character Answers:

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BIRD

DIAL

HAIL

NAME

RING

ROBO

ROLL

TERM

TOLL



5 Character Answers:

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AHALT

HOUSE

PHONE

RADIO

VISIT

WAKEN



6 Character Answers:

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BECKON

DECIDE

PORTOF

RINGUP

SUMMON



7 Character Answers:

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ENTITLE

MEMADAM

PHONEME



9 Character Answers:

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TELEPHONE



11 Character Answers:

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GIVEMEABUZZ