Discovered the cash pool contained nothing (5)

I believe the answer is:
found
'discovered' is the definition.
(to discover is to find)
'cash pool contained nothing' is the wordplay.
I cannot quite understand how this works, but
'nothing' could be 'o' (looks like zero - 0) and 'o' is found within the answer.
'cash' could be 'fund' (as in a fund of cash) and 'fund' is present in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'the' acts as a link.
Can you help me to learn more?
(Other definitions for found that I've seen before include "To bring into being; cast" , "Discovered" , "Start" , "Launch" , "Establish" .)
