Demolished by the wild sea invading the road (5)
I believe the answer is:
rased
'demolished' is the definition.
(I've seen this in another clue)
'wild sea invading the road' is the wordplay.
'wild' is an anagram indicator.
'invading' means one lot of letters goes inside another.
'the road' becomes 'rd' (abbreviation for road).
'sea' with letters rearranged gives 'ase'.
'ase' put within 'rd' is 'RASED'.
'by the' acts as a link.
(Other definitions for rased that I've seen before include "totally devastated" , "knocked down" , "Levelled to the ground" , "brought low" , "Destroyed, tore down to the ground" .)