List of items to be discussed by top lawyer and former Taoiseach (6)
I believe the answer is:
agenda
'list of items to be discussed' is the definition.
(I've seen this in another clue)
'top lawyer and former taoiseach' is the wordplay.
'top lawyer' becomes 'AG' (abbreviation for attorney general).
'and' is a charade indicator (letters next to each other).
'former taoiseach' becomes 'enda' (I am not sure about this - if you are sure you should believe this answer much more).
'ag'+'enda'='AGENDA'
'by' acts as a link.
Can you help me to learn more?
(Other definitions for agenda that I've seen before include "List of items for committee to consider" , "Timetable" , "List of things to be done or discussed" , "Topic list for meeting" , "Menu" .)