Man facing criticism in case of tawdry treatment (7)
I believe the answer is:
therapy
'treatment' is the definition.
('therapy' can be a synonym of 'treatment')
'man facing criticism in case of tawdry' is the wordplay.
'man' becomes 'he'.
'facing criticism' becomes 'rap' (I can't explain this - if you can you should give a lot more credence to this answer).
'in' is an insertion indicator.
'case of' suggests removing the centre (outsides of).
'tawdry' with its middle removed is 'ty'.
'he'+'rap'='herap'
'herap' going within 'ty' is 'THERAPY'.
Can you help me to learn more?
(Other definitions for therapy that I've seen before include "Remedial treatment" , "Treatment designed to cure illness or disability" , "Healing treatment" , "will do you good" , "Curative treatment" .)