Oration composed for Canadian province (7)
I believe the answer is:
ontario
'canadian province' is the definition.
(Ontario is an example)
'oration composed' is the wordplay.
'composed' indicates anagramming the letters.
'oration' is an anagram of 'ONTARIO'.
'for' is the link.
(Other definitions for ontario that I've seen before include "part of Canada" , "vast lake" , "Smallest of the Great Lakes" , "One of the Great Lakes" , "Canadian Great lakes province" .)