Ulterior motive (6,6)
I believe the answer is:
hidden agenda
'ulterior motive' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hidden agenda that I've seen before include "Ulterior motive" , "Concealed intentions" , "that could delay the meeting?" , "followed in secret meeting?" , "covert plan" .)