Aim to be in disagreement as announced (9)
I believe the answer is:
intention
'aim' is the definition.
(synonyms)
'disagreement as announced' is the wordplay.
I cannot really understand how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
This explanation may well be incorrect...
'to be in' acts as a link.
Can you help me to learn more?
(Other definitions for intention that I've seen before include "Aim, plan" , "Plan, purpose" , "end" , "Aim, objective" , "Design" .)