Clergy ultimately preach nonsense in diocese? (7)

I believe the answer is:

eparchy

'diocese?' is the definition.
(I know that eparchy is a type of diocese)

'clergy ultimately preach nonsense' is the wordplay.
'ultimately' suggests the final letters.
'nonsense' indicates an anagram.
The final letter of 'clergy' is 'y'.
'y'+'preach'='ypreach'
'ypreach' with letters rearranged gives 'EPARCHY'.

'in' acts as a link.

I've seen this clue in The Guardian.

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