Crossword Genius

Black stuff that could be blue (4)


I believe the answer is:


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Here is my best explanation:

This clue is a double definition.

'black stuff' is the first definition.
(flake of soot)

'could be blue' is the second definition.
('blue' can mean pornographic or smutty)

'that' is the link.


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This clue was last seen in The Guardian

(Other definitions for smut that I've seen before include "A black mark or indecent talk", "particle", "speck", "Dirty jokes - black mark", "Sooty matter", "Sooty deposit", "Mildly obscene remarks", "Small flake of dirt", "Dirty stuff" and "Dirt or immoral talk".)

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