Oration slammed in Canadian province (7)

I believe the answer is:

ontario

'canadian province' is the definition.
(Ontario is an example)

'oration slammed' is the wordplay.
'slammed' indicates an anagram.
'oration' with letters rearranged gives 'ONTARIO'.

'in' acts as a link.

(Other definitions for ontario that I've seen before include "Province of central Canada" , "vast lake" , "A North American lake" , "Most populous Canadian province" , "Oration in Canadian province" .)

I've seen this clue in The Sun.

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