Teacher meeting commanders in hot oppressive wind (7)
I believe the answer is:
sirocco
'hot oppressive wind' is the definition.
(type of wind)
'teacher meeting commanders' is the wordplay.
I cannot really understand how this works, but
'teacher' could be 'sir' (way of addressing a male teacher) and 'sir' is found within the answer.
This explanation may well be incorrect...
'in' acts as a link.
(Other definitions for sirocco that I've seen before include "Hot wind reaching Italy from Africa" , "Hot wind that reaches Italy from Africa" , "Hot wind blowing from north Africa to southern Europe" , "Hot, dry wind from northern Africa" , "Hot Saharan wind blowing into the Mediterranean" .)