Having the wherewithal (4)
I believe the answer is:
able
'having the wherewithal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for able that I've seen before include "Competent, having ability" , "Talented" , "Competent, capable" , "Competent as seaman may be" , "Adept" .)