Soul, after treatment, indeed scratching no more? (8)
I believe the answer is:
deloused
'scratching no more?' is the definition.
(lice may cause scratching)
'soul after treatment indeed' is the wordplay.
I cannot really see how this works, but
an anagram of 'soul' is 'lous' which is within the answer.
The remaining letters 'deed' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for deloused that I've seen before include "free of pests" , "got rid of parasites" , "Made free of lice" .)