Soldier is more offensive (6)
I believe the answer is:
ranker
I believe this is a double definition.
'soldier' is the first definition.
(ranker is a kind of soldier)
'more offensive' is the second definition.
('rank' can be similar in meaning to 'offensive')
'is' is the link.
(Other definitions for ranker that I've seen before include "Smelling worse" , "Commissioned officer" , "Private soldier" , "A private; an officer" , "Tommy" .)