Favourable result — reverse of home leg in capital city (8)
I believe the answer is:
winnipeg
'capital city' is the definition.
(capital of Manitoba, Canada)
'favourable result reverse of home leg' is the wordplay.
'favourable result' becomes 'win' (I can't explain this - if you can you should believe this answer much more).
'reverse of' is a reversal indicator.
'home' becomes 'in' ('he's home' can mean 'he's in').
'leg' becomes 'peg' (synonyms).
'in' in reverse letter order is 'ni'.
'win'+'ni'+'peg'='WINNIPEG'
'in' is the link.
Can you help me to learn more?
(Other definitions for winnipeg that I've seen before include "Capital of Manitoba" , "where winters are very harsh" , "somewhere in Canada" , "Large lake in Manitoba" , "South Canadian city" .)