I arrive dishevelled from coastal area (7)
I believe the answer is:
riviera
'coastal area' is the definition.
(I've seen this before)
'i arrive dishevelled' is the wordplay.
'dishevelled' is an anagram indicator.
'i'+'arrive'='iarrive'
'iarrive' with letters rearranged gives 'RIVIERA'.
'from' acts as a link.
(Other definitions for riviera that I've seen before include "Warm coastal district" , "France/Italy Med coast" , "Coastal area between Italy and France" , "Mediterranean playground of the rich" , "Coastal area between Cannes and Italy" .)