Outstanding wealth (7)
I believe the answer is:
capital
This clue is a double definition.
'outstanding' is the first definition.
(thesaurus)
'wealth' is the second definition.
(I've seen this before)
(Other definitions for capital that I've seen before include "Cardinal; splendid; assets" , "Finance - excellent!" , "Finances" , "Upper-case letter" , "Rome or Oslo?" .)