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All answers having "Do" as clue:

3 Character Answers:

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ACT

APE

CDE

OTA

SOL

TRY

YOU



4 Character Answers:

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AFRO

BASH

COIF

DOSI

FARE

ITLL

LATI

MIFA

NOTE

PERM

REMI

SOLA

SUIT

TELL

TONE



5 Character Answers:

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ADEER

IDARE

IEVER

ITNOW

NOTES

ORDIE

PARTY

SERVE

SOLVE

STYLE

TONES



6 Character Answers:

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AFFAIR

ASISAY

GOODER

MURDER

OCTAVE

SOIREE



7 Character Answers:

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ACHIEVE

CARRYON

DERRING

EXECUTE

IMITATE

PERFORM

SUFFICE



8 Character Answers:

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APPEARTO

COIFFURE

PRACTICE



9 Character Answers:

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SCALENOTE



10 Character Answers:

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MAJORSCALE



15 Character Answers:

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KEYNOTEINASCALE