Money, you’ll find, you need to work for (5)
I believe the answer is:
learn
'you need to work for' is the definition.
I can't judge whether this definition defines the answer.
'money you'll' is the wordplay.
'money' becomes 'l' (L can mean 'pounds').
'you'll' becomes 'earn' (I am not sure about this - if you are sure you should believe this answer much more).
'l'+'earn'='LEARN'
'find' acts as a link.
Can you help me to learn more?
(Other definitions for learn that I've seen before include "Hear - memorise" , "be taught a lesson" , "Gain knowledge or skills" , "Acquire knowledge or skill" , "Come to know" .)