Matter cleaner, wiped at the front (5)

I believe the answer is:

issue

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'matter cleaner' is the definition.
'issue' can be an answer for 'matter' (I've seen this in another clue). I am not certain of the 'cleaner' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for issue that I've seen before include "Edition of a publication" , "Children; matter" , "Outcome - children" , "Number (of periodical)" , "Problem or concern" .)

I've seen this clue in The Telegraph.

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