County's brand of football ultimately brought win (7)
I believe the answer is:
rutland
'county's' is the definition.
(I've seen this before)
'football ultimately brought win' is the wordplay.
'football' becomes 'RU' (I've seen this in other clues).
'ultimately' says to take the final letters.
'win' becomes 'land' (both can mean to secure or obtain).
The last letter of 'brought' is 't'.
'ru'+'t'+'land'='RUTLAND'
'brand of' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for rutland that I've seen before include "England's smallest county" , "Tiny county" , "Bucks? Something of that ilk" , "Smallest of the historical English counties" , "East Midlands county" .)