Concerning the origins of the wealth (9)
I believe the answer is:
resources
'wealth' is the definition.
(thesaurus)
'concerning the origins' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'the origins' becomes 'sources' ('source' can be a synonym of 'origin').
're'+'sources'='RESOURCES'
'of the' is the link.
(Other definitions for resources that I've seen before include "capital!" , "country's means of defence" , "funds" , "Teaching materials" , "Available reserve supplies" .)