Violent windstorm (7)
'violent windstorm' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tornado that I've seen before include "Road not turned in the windstorm" , "Hurricane" , "Whirling storm" , "Rapidly whirling column of air" , "lot of wind" .)
'violent windstorm' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cyclone that I've seen before include "Violent whirling wind" , "kind of weather?" , "Depression - tropical storm" , "storm in the West Indies, say" , "Wind spiral" .)