Computer language includes information in list of items (6)
I believe the answer is:
agenda
'list of items' is the definition.
(items for discussion at a meeting)
'computer language includes information' is the wordplay.
'computer language' becomes 'ada' (Ada is a computer language).
'includes' is an insertion indicator.
'information' becomes 'gen' (gen can informally mean information).
'ada' enclosing 'gen' is 'AGENDA'.
'in' is the link.
(Other definitions for agenda that I've seen before include "Menu" , "Matters to be addressed" , "List of matters to be discussed at a meeting" , "Scheme" , "Topic list for meeting" .)