Donor at dance creating a storm (7)
I believe the answer is:
tornado
'a storm' is the definition.
(tornado is a kind of storm)
'donor at dance' is the wordplay.
'dance' indicates an anagram.
'donor'+'at'='donorat'
'donorat' is an anagram of 'TORNADO'.
'creating' is the link.
(Other definitions for tornado that I've seen before include "threat" , "Windy hazard" , "Donator of fierce wind" , "Terrible current" , "It's a big blow" .)