Find there’s money to be paid (5)
I believe the answer is:
learn
'find' is the definition.
(I've seen this before)
'there's money to be paid' is the wordplay.
'there's' says to put letters next to each other.
'money' becomes 'l' (L can mean 'pounds').
'to be paid' becomes 'earn' (I've seen this before**).
'l' next to 'earn' is 'LEARN'.
(Other definitions for learn that I've seen before include "Succeed in school" , "Study or digest" , "Come to know" , "Gain knowledge or skill" , "Study (at school?)" .)