Way in which one might pay for treatment? (6,6)
I believe the answer is:
harley street
'in which one might pay for treatment?' is the definition.
The definition suggests a singular noun which matches the answer.
'way' is the wordplay.
I cannot quite see how this works, but
'way' could be 'street' (street is a kind of way) and 'street' is found in the answer.
The remaining letters 'harley' 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?
(Other definitions for harley street that I've seen before include "On which many doctors" , "Top doctors' address" , "private health here" , "London thoroughfare noted for medical specialists" , "London thoroughfare famed for doctors" .)