Items finish in oven (6)
I believe the answer is:
agenda
'items' is the definition.
(items for discussion in a meeting)
'finish in oven' is the wordplay.
'finish' becomes 'end' ('end' can be a synonym of 'finish').
'in' indicates putting letters inside.
'oven' becomes 'aga' (type of large oven).
'end' put into 'aga' is 'AGENDA'.
(Other definitions for agenda that I've seen before include "Schedule of items for meeting" , "Schedule, order of business" , "Meeting's topics" , "List of things to be done or discussed" , "Programme of a meeting" .)