Money earned once Im working (6)
I believe the answer is:
income
'money earned' is the definition.
(I've seen this before)
'once im working' is the wordplay.
'working' indicates anagramming the letters.
'once'+'im'='onceim'
'onceim' anagrammed gives 'INCOME'.
(Other definitions for income that I've seen before include "Returns" , "See 12" , "Money gained over time" , "Money earned" , "Money from investments or for work" .)