Programme oven, maintaining limit (6)
I believe the answer is:
agenda
'programme' is the definition.
(I know that agenda is a type of programme)
'oven maintaining limit' is the wordplay.
'oven' becomes 'aga' (type of large oven).
'maintaining' means one lot of letters goes inside another (inserted letters are held or maintained).
'limit' becomes 'end' (I've seen this in another clue).
'aga' enclosing 'end' is 'AGENDA'.
(Other definitions for agenda that I've seen before include "List of items for discussion at a meeting" , "Items of business for committee meeting" , "Schedule - things to be done" , "Something perhaps hidden" , "List of matters to be discussed at a meeting" .)