Capital outcome in street repairs (8)

I believe the answer is:

interest

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

'capital outcome' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'in street repairs' is the wordplay.
'repairs' indicates anagramming the letters (I've seen 'repaired' mean this).
'street' with letters rearranged gives 'terest'.
'in'+'terest'='INTEREST'

Can you help me to learn more?

(Other definitions for interest that I've seen before include "Profit" , "Charge for money borrowed" , "Stake; concern deeply" , "Charge or payment for the use of money" , "Stake, share" .)

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

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.