Set way of raising money? (8)
I believe the answer is:
telethon
'set way of raising money?' is the definition.
The definition suggests a singular noun which matches the answer.
'set way of raising money?' is the wordplay.
I cannot really see how this works, but
'way' could be 'n' (Compass direction - North) and 'n' is found in the answer.
'of' could be 'o' and 'o' is located in the answer.
'money?' could be 'l' (L can mean 'pounds') and 'l' is found in the answer.
'set' could be 'tee' (teeing is a kind of setting) and 'tee' is present in the leftover letters.
This explanation may well be incorrect...
(Other definitions for telethon that I've seen before include "TV broadcast for charity" , "Lengthy TV programme for charity" , "TV fundraiser" , "Long charity TV show" , "Lengthy broadcast for charity" .)