Sign for some battle orders (3)
I believe the answer is:
leo
'sign' is the definition.
(star sign)
'some battle orders' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'LEO' is hidden within 'battle orders'.
'for' acts as a link.
(Other definitions for leo that I've seen before include "Lion sign of the Zodiac" , "MGM's lion" , "sign of summer" , "of pride" , "Man" .)