Examine US prosecutor left in disgrace (7)
I believe the answer is:
scandal
'disgrace' is the definition.
(thesaurus)
'examine us prosecutor left' is the wordplay.
'examine' becomes 'scan' (scanning is a kind of examining).
'us prosecutor' becomes 'da' (district attorney).
'left' becomes 'l' (common abbreviation).
'scan'+'da'+'l'='SCANDAL'
'in' is the link.
(Other definitions for scandal that I've seen before include "Shocking thing" , "Event causing public outrage" , "disgraceful behaviour" , "Outrageous event" , "content of 3 [RED TOPS]?" .)