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All answers having "Draw out" as clue:

3 Character Answers:

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EKE



4 Character Answers:

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MILK



5 Character Answers:

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EDUCE

EVOKE

LEACH



6 Character Answers:

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ELICIT

EXTEND

SIPHON



7 Character Answers:

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EXTRACT

PROLONG



8 Character Answers:

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COCKATOO

ELONGATE

PROTRACT