Dope interrupting a DA's schedule (6)
I believe the answer is:
agenda
'schedule' is the definition.
(synonyms)
'dope interrupting a da's' is the wordplay.
'dope' becomes 'gen' (both can mean information).
'interrupting' means one lot of letters goes inside another.
'a'+'da'='ada'
'gen' placed inside 'ada' is 'AGENDA'.
(Other definitions for agenda that I've seen before include "things to discuss" , "Timetable" , "Items of business for committee meeting" , "List of things to be done or discussed" , "List of items to be done" .)