My special area of coastal mountain road (8)
I believe the answer is:
corniche
'coastal mountain road' is the definition.
(road on the edge of a cliff)
'my special area' is the wordplay.
'my' becomes 'cor' (both are expressions of surprise).
'special area' becomes 'niche' (a niche is a specialised place or position).
'cor'+'niche'='CORNICHE'
'of' acts as a link.
(Other definitions for corniche that I've seen before include "Cliff-side road" , "way along cliff edge" , "Coastal cliff road" , "cliff route" , "Roller" .)