Apathetic want a platform, I state (13)
I believe the answer is:
lackadaisical
'apathetic' is the definition.
(thesaurus)
'want a platform i state' is the wordplay.
'want' becomes 'lack' ('lack' can be a synonym of 'want').
'platform' becomes 'dais' (dais is a kind of platform).
'i state' becomes 'ical' (I can't justify this - if you can you should believe this answer much more).
'lack'+'a'+'dais'+'ical'='LACKADAISICAL'
Can you help me to learn more?
(Other definitions for lackadaisical that I've seen before include "Showing little enthusiasm and rigour" , "Lethargic" , "Careless and lazy" , "Apathetic" , "Half-hearted" .)