Too darn windy — could be a storm (7)
I believe the answer is:
tornado
'a storm' is the definition.
(tornado is a kind of storm)
'too darn windy' is the wordplay.
'windy' indicates anagramming the letters (windy suggests disruption).
'too'+'darn'='toodarn'
'toodarn' is an anagram of 'TORNADO'.
'could be' acts as a link.
(Other definitions for tornado that I've seen before include "Severe wind" , "Violent twister" , "wind-up" , "Whirling windstorm" , "Major storm" .)