Focusing cash primarily on helping to support change in America (13)
I believe the answer is:
concentration
'focusing' is the definition.
(thesaurus)
'helping to support change in america' is the wordplay.
'helping' becomes 'ration' (a ration is a serving or helping).
'to support' says to put letters next to each other (in a down clue, some letters hold up others).
'change in america' becomes 'concent' (I can't explain this - if you can you should give a lot more credence to this answer).
'ration' put after 'concent' is 'CONCENTRATION'.
'cash primarily on' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for concentration that I've seen before include "A close gathering of things" , "relative amount put in to get solution?" , "Absorption" , "Application" , "A close gathering; mental focus" .)