Norm, a soldier (4)
I believe the answer is:
para
'soldier' is the definition.
(para is a kind of soldier)
'norm a' is the wordplay.
'norm' becomes 'par' (I've seen this before).
'par'+'a'='PARA'
(Other definitions for para that I've seen before include "Brazilian state" , "Air-drop soldier" , "Soldier (shortened)" , "High-jumper" , "Soldier who jumps to order? (abbr)" .)