Proceeds to let off inner gas (8)

I believe the answer is:

earnings

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

'proceeds' is the definition.
(I've seen this before)

'off inner gas' is the wordplay.
'off' indicates anagramming the letters.
'inner'+'gas'='innergas'
'innergas' with letters rearranged gives 'EARNINGS'.

'to let' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for earnings that I've seen before include "Salary" , "Income from work" , "Remunerations" , "Moneys brought in for grannies" , "Moneys received for grannies" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.