Those over there accepting blame after main treatment of disease (4,7)

'those over there accepting' is the definition.
I can't tell whether this definition defines the answer.

'blame after main treatment of disease' is the wordplay.
'blame' becomes 'the rap' (someone blamed for something 'takes the rap').
'after' says to put letters next to each other.
'main' becomes 'deep' (I've seen this before).
'treatment of disease' becomes 'y' (I can't explain this - if you can you should believe this answer much more).
'therap' put after 'deep' is 'deeptherap'.
'deeptherap'+'y'='DEEP THERAPY'

Can you help me to learn more?