Issue detective's accusation (9)
I believe the answer is:
discharge
'issue' is the definition.
(thesaurus)
'detective's accusation' is the wordplay.
'detective's' becomes 'dis' (Detective Inspector).
'accusation' becomes 'charge' (I've seen this before).
'dis'+'charge'='DISCHARGE'
(Other definitions for discharge that I've seen before include "empty" , "Acquit" , "Fire (a gun); release from custody" , "pay" , "meet" .)