Earnings to enter back-to-front (6)
I believe the answer is:
income
'earnings' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for income that I've seen before include "See 12" , "Coin me! (anag)" , "Salary" , "Wage" , "What do you make" .)