Blow from wind is astern (8)
I believe the answer is:
disaster
'blow' is the definition.
(thesaurus)
'from wind is astern' is the wordplay.
'from' indicates the answer is hidden within the clue.
'DISASTER' is hidden within 'wind is astern'.
(Other definitions for disaster that I've seen before include "awful situation" , "Tragedy of asterids" , "Event causing great damage" , "Calamity, tragedy" , "Catastrophe, tragedy" .)