Get old and revised list of items (6)
I believe the answer is:
agenda
'list of items' is the definition.
(I've seen this before)
'get old and revised' is the wordplay.
'get old' becomes 'age' ('age' can be a synonym of 'get old').
'revised' indicates anagramming the letters.
'and' anagrammed gives 'nda'.
'age'+'nda'='AGENDA'
(Other definitions for agenda that I've seen before include "Schedule of items for meeting" , "Items for discussion at committee meeting" , "Schedule - things to be done" , "List of items for discussion at a meeting" , "List of items for discussion by committee" .)