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There's a natural abhorrence for such a cleaner (6)

Ross

I believe the answer is:

vacuum

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'a cleaner' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

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(Other definitions for vacuum that I've seen before include "A region empty of matter" , "cleaner" , "Emptiness" , "Totally empty space" , "Absence of matter" .)

I've seen this clue in The Globe and Mail.
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