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Domestic pet and a parting-maker's cellars (9)

Ross

I believe the answer is:

catacombs

I'm a little stuck... Click here to teach me more about this clue!

'cellars' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

'domestic pet and a parting-maker's' is the wordplay.
'domestic pet' becomes 'cat'.
'and' is a charade indicator (letters next to each other).
'parting maker's' becomes 'combs' (I can't explain this - if you can you should give a lot more credence to this answer).
'cat'+'a'+'combs'='CATACOMBS'

Can you help me to learn more?

(Other definitions for catacombs that I've seen before include "Underground burial places" , "Vaults" , "burial place" , "Underground cemeteries constructed by the ancient Romans" , "Underground tombs" .)

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