Term is abused by episcopal offices (6)

I believe the answer is:

mitres

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'episcopal offices' 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?

'term is abused' is the wordplay.
'abused' indicates anagramming the letters.
'term'+'is'='termis'
'termis' anagrammed gives 'MITRES'.

'by' is the link.

Can you help me to learn more?

(Other definitions for mitres that I've seen before include "Ornate hats for bishops" , "Bishops' headdresses" , "Heads of church put on these" .)

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

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