Not good at needing money (4)
I believe the answer is:
poor
I believe this is a double definition.
'not good' is the first definition.
(I've seen this in another clue)
'needing money' is the second definition.
'at' is the link.
(Other definitions for poor that I've seen before include "Of low standard" , "Low-quality" , "Shoddy" , "In want; below par" , "They used to have a law" .)