City in the Americas is, oddly, not a city in the Americas (7)
I believe the answer is:
ontario
'city in the americas' is the definition.
'ontario' can be an answer for 'city' (I've seen this before). I'm not certain of the 'in the americas' bit.
'oddly not a city in the americas' is the wordplay.
'oddly' indicates anagramming the letters.
'a city in the americas' becomes 'ario' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'not' anagrammed gives 'ont'.
'ont'+'ario'='ONTARIO'
'is' is the link.
Can you help me to learn more?
(Other definitions for ontario that I've seen before include "city" , "provincial area" , "one of the provinces" , "Province of SE Canada, and a Great Lake" , "Most populous Canadian province" .)