Son opposed to a journey in capital (8)
I believe the answer is:
santiago
'capital' is the definition.
(Santiago is an example)
'son opposed to a journey' is the wordplay.
'son' becomes 's'.
'opposed to' becomes 'anti' (I've seen this before).
'journey' becomes 'go' (I've seen this in other clues).
's'+'anti'+'a'+'go'='SANTIAGO'
'in' is the link.
(Other definitions for santiago that I've seen before include "City" , "South American capital" , "Capital of Chile" , "Chilean capital" , "Chile's capital" .)