One giving party no rupees (5)
I believe the answer is:
donor
'one giving' is the definition.
(I've seen this before)
'party no rupees' is the wordplay.
'party' becomes 'don' (I can't justify this - if you can you should believe this answer much more).
'no' becomes 'O' (O resembles 0).
'rupees' becomes 'r' (abbreviation for rupees).
'don'+'o'+'r'='DONOR'
Can you help me to learn more?
(Other definitions for donor that I've seen before include "Philanthropist" , "blessed person, relatively" , "One contributing" , "One who gives, perhaps blood" , "A giver, perhaps of blood" .)