The various topics aim to be compatible (9)
I believe the answer is:
simpatico
'compatible' is the definition.
Both the answer and definition are adjectives.
Perhaps they are linked in a way I don't understand?
'the various topics aim' is the wordplay.
'the various' indicates anagramming the letters.
'topics'+'aim'='topicsaim'
'topicsaim' with letters rearranged gives 'SIMPATICO'.
'to be' is the link.
Can you help me to learn more?
(Other definitions for simpatico that I've seen before include "Congenial company" , "Pleasant" , "pleasing" , "Likeable, easy to get on with" , "Nice" .)