Way of overcoming pain through separating object and subject (4,4,6)

'way of overcoming pain' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'through separating object and subject' is the wordplay.
I cannot quite see how this works, but
'through' could be 'over' (I've seen this in another clue) and 'over' is present in the answer.
'object' could be 'matter' (matter is a kind of object) and 'matter' is found within the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
The remaining letters 'mid' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?