Charge accepted by those people providing form of treatment (7)
I believe the answer is:
therapy
'form of treatment' is the definition.
'therapy' can be an answer for 'treatment' (synonyms). I am not sure about the 'form of' bit.
'charge accepted by those people' is the wordplay.
'charge' becomes 'rap' (both can mean blame or responsibility).
'accepted by' is an insertion indicator (inserted letters are accepted).
'those people' becomes 'they' ('they' refers to a group of people).
'rap' put inside 'they' is 'THERAPY'.
'providing' is the link.
Can you help me to learn more?
(Other definitions for therapy that I've seen before include "healing process" , "Healing treatment" , "Treatment designed to cure illness or disability" , "will do you good" , "Remedial treatment" .)