Road not damaged by storm (7)
I believe the answer is:
tornado
'storm' is the definition.
(type of weather)
'road not damaged' is the wordplay.
'damaged' indicates anagramming the letters.
'road'+'not'='roadnot'
'roadnot' is an anagram of 'TORNADO'.
'by' is the link.
(Other definitions for tornado that I've seen before include "Violent wind storm" , "Terrible storm" , "It's a big blow" , "Whirling windstorm" , "A violent and destructive whirlwind" .)