Harsh wind from south and east (7)
I believe the answer is:
austere
'harsh' is the definition.
(thesaurus)
'wind from south and east' is the wordplay.
I cannot quite see how this works, but
'wind' could be 'auster' (I've seen this before) and 'auster' is located in the answer.
'east' could be 'e' ('E' can be a synonym of 'east') and 'e' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for austere that I've seen before include "Serious" , "Spartan and abstemious" , "Severely simple and plain in appearance" , "Abstemious, strict" , "Without luxury or ornament" .)