Crossword Genius

What a fisherman actually gains from his work? (3,6)

Ross

I believe the answer is:

net profit

I'm a little stuck... Click here to teach me more about this clue!

'gains from his work?' is the definition.
'net profit' can be an answer for 'gains' (thesaurus). I am unsure of the 'from his work?' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for net profit that I've seen before include "Earnings after all deductions" , "Actual money to be made" , "Excess of sales over costs for potent fir" , "return from business" , "What's finally made" .)

I've seen this clue in The Globe and Mail.
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