Accessing a mountain, road we take ultimately for British city (8)
I believe the answer is:
aberdeen
'british city' is the definition.
(I've seen this before)
'accessing a mountain road we take ultimately' is the wordplay.
'accessing' indicates putting letters inside (inserted letters gain access).
'a' becomes 'an'.
'mountain' becomes 'ber' (I can't explain this - if you can you should believe this answer much more).
'ultimately' says to take the final letters.
The final letters of 'road we take' are 'dee'.
'ber'+'dee'='berdee'
'an' placed around 'berdee' is 'ABERDEEN'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for aberdeen that I've seen before include "PM, resigned over Crimea" , "Scottish North Sea city" , "Grampian city and port" , "Scottish port" , "somewhere in Scotland" .)