It's on the agenda (4)
I believe the answer is:
item
'it's on the agenda' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for item that I've seen before include "Individual unit in a list" , "partners" , "Piece in paper" , "'One thing, poor mite (4)'" , "Two people widely seen as one?" .)