Funnel-shaped windstorm (7)
I believe the answer is:
tornado
'funnel-shaped windstorm' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tornado that I've seen before include "Violent whirlwind over land" , "Road not turned in the windstorm" , "RAF fighter; whirlwind" , "Donator (anag.)" , "squall" .)