Again, earned income will do away with debt (5)
I believe the answer is:
repay
'do away with debt' is the definition.
I can't judge whether this definition defines the answer.
'again earned income' is the wordplay.
'again' becomes 're' (prefix meaning 'again').
'earned income' becomes 'pay' (income from a job. I am not sure about the 'earned' bit.).
're'+'pay'='REPAY'
'will' is the link.
Can you help me to learn more?
(Other definitions for repay that I've seen before include "Refund or reward" , "Quite old" , "recompense" , "Reimburse" , "Return money borrowed" .)