Great if you have the wherewithal (7)
I believe the answer is:
capital
'wherewithal' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for capital that I've seen before include "Money saved or invested - seat of government" , "city such as London" , "Rome or Oslo?" , "Principal city" , "It's excellent in the big city" .)