A good finish to a schedule (6)
I believe the answer is:
agenda
'schedule' is the definition.
('agenda' can be a synonym of 'schedule')
'a good finish to a' is the wordplay.
'a good' becomes 'ag' (I've seen this in other clues).
'finish' becomes 'end' ('end' can be a synonym of 'finish'**).
'ag'+'end'+'a'='AGENDA'
(Other definitions for agenda that I've seen before include "Schedule of items for meeting" , "Topic list for meeting" , "List of items of business for committee" , "Plan for meeting" , "Programme of business" .)