Where a Scot might cure my failing hearing, initially, on river (9)

'where a scot might cure' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'my failing hearing initially on river' is the wordplay.
I cannot really understand how this works, but
'my' could be 'cor' (both are expressions of surprise) and 'cor' is found in the answer.
'river' could be 'ouse' (Yorkshire river) and 'ouse' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?