Money at one's fingertips (5)
I believe the answer is:
ready
I believe this is a double definition.
'money' is the first definition.
(I've seen this before)
'at one's fingertips' is the second definition.
(Other definitions for ready that I've seen before include "Primed" , "Prepare money" , "Intelligent" , "rough companion" , "Willing (to do something); cash" .)