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All answers having "Just like that!" as clue:

3 Character Answers:

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AND

BAM

POW

RHO



4 Character Answers:

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ALSO

ASIS

BANG

POOF

SNAP

TADA

WHAM



6 Character Answers:

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PRESTO



7 Character Answers:

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INASNAP



8 Character Answers:

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BADABING

INAFLASH