In raising money for nothing (3)
I believe the answer is:
nil
'nothing' is the definition.
('nil' can be a synonym of 'nothing')
'in raising money' is the wordplay.
'raising' says the letters should be written in reverse.
'money' becomes 'l' (L can mean 'pounds'**).
'in' back-to-front is 'ni'.
'ni'+'l'='NIL'
'for' is the link.
(Other definitions for nil that I've seen before include "Nothing, zero" , "0" , "none" , "You get nothing" , "Zero, zilch" .)