Crossword Genius

Endless dirt: it is recurrent, creating baffling problems (6)

Ross

I believe the answer is:

cruxes

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'baffling problems' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe you can see a link between them that I don't see?

'endless dirt it is recurrent' is the wordplay.
'endless dirt' becomes 'cru' (I am not sure about this - if you are sure you should believe this answer much more).
'it' becomes 'sex' ('it' is a common euphemism for sex).
'is recurrent' shows that the letters should be reversed in order (recurrent can mean turning back).
'sex' written backwards gives 'xes'.
'cru'+'xes'='CRUXES'

'creating' acts as a link.

Can you help me to learn more?

(Another definition for cruxes that I've seen is " Vital parts of problems, decisive points".)

I've seen this clue in The Guardian.
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