Quite a blow as aborted process throws one out (7)
I believe the answer is:
mistral
'quite a blow' is the definition.
(strong wind)
I cannot understand how the remainder of the clue works.
(Other definitions for mistral that I've seen before include "Cold dry wind in southern France" , "Famous wind in the Rhone Valley blowing towards the Med" , "French wind" , "Strong wind down the 20 valley" , "Violent northeast wind of southern France" .)