Aim to interrupt a lot of discussion in items for meetings (7)
I believe the answer is:
agendas
'items for meetings' is the definition.
'aim to interrupt a lot of discussion' is the wordplay.
'aim' becomes 'end' (I've seen this before).
'to interrupt' means one lot of letters goes inside another.
'lot of discussion' becomes 'gas' (informal term for a lot of talking).
'a'+'gas'='agas'
'end' put into 'agas' is 'AGENDAS'.
'in' acts as a link.
(Other definitions for agendas that I've seen before include "Lists of matters to be taken up at meetings" , "Orders of business" , "Committee-matters" , "programmes" , "Schedules" .)