In cathedral city I'm hers, possibly (6)

I believe the answer is:

rheims

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'in cathedral city' is the definition.
'rheims' can be an answer for 'city' (French city). I'm not certain of the 'in cathedral' bit.

'i'm hers possibly' is the wordplay.
'possibly' is an anagram indicator.
'im'+'hers'='imhers'
'imhers' anagrammed gives 'RHEIMS'.

Can you help me to learn more?

(Other definitions for rheims that I've seen before include "Where most French coronations took place" , "The Jackdaw of -- (Barham)" , "French town" , "Somewhere in France" , "French coronation city" .)

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

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