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Relations seen in abattoir? (5,3,5)

Ross

I believe the answer is:

flesh and blood

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'relations' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

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(Other definitions for flesh and blood that I've seen before include "Real - relatives" , "One's own family" , "Human nature - kin" , "Kin - of a bodily nature" , "Relatives (one's own?)" .)

I've seen this clue in the Sydney Morning Herald.
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