Vacant celebrity copy causing storm (7)
I believe the answer is:
cyclone
'storm' is the definition.
(cyclone is a kind of storm)
'vacant celebrity copy' is the wordplay.
'vacant' says to hollow out the word (remove centre letters).
'copy' becomes 'clone' (cloning is a kind of copying**).
'celebrity' with its middle taken out is 'cy'.
'cy'+'clone'='CYCLONE'
'causing' is the link.
(Other definitions for cyclone that I've seen before include "storm in the West Indies, say" , "Typhoon" , "Wind spiral" , "Violent whirling wind" , "lots of wind" .)