They must accept hip-hop treatment (7)
I believe the answer is:
therapy
'treatment' is the definition.
(I know that therapy is a type of medical aid)
'they must accept hip-hop' is the wordplay.
'must accept' indicates putting letters inside.
'hip-hop' becomes 'rap' (I've seen this in another clue).
'they' placed around 'rap' is 'THERAPY'.
(Other definitions for therapy that I've seen before include "See 7" , "Healing treatment" , "They rap (anag.)" , "Medical treatment" , "Treatment designed to cure illness or disability" .)