Star soldier, God of war (7)
I believe the answer is:
antares
'star' is the definition.
(Antares is an example)
'soldier god of war' is the wordplay.
'soldier' becomes 'ant' (I've seen this before).
'god of war' becomes 'ares' (I've seen this before).
'ant'+'ares'='ANTARES'
(Other definitions for antares that I've seen before include "brilliant point" , "Star reddened" , "RS [RED STAR]" , "Red supergiant star in Scorpio; nae star (anag.)" , "Red supergiant star in Scorpius" .)