Motoring group welcomes great finish - it's what you get from the programme (6)
I believe the answer is:
Here is my best explanation:
'the programme' is the definition.
(agenda is a kind of programme)
'motoring group welcomes great finish it's what you get' is the subsidiary indication.
I cannot really see how this works, but
'group' could be 'age' (age group is a kind of group) and 'age' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'from' is the link.
(Other definitions for agenda that I've seen before include "things to discuss", "Things to be done", "Topics for a meeting", "Business schedule", "List of items for discussion by committee", "plan of things to be done", "Order of business", "Business for meeting", "Individual objective(s)" and "To-do list".)