Bowman miles away from infantryman? (6)
I believe the answer is:
archer
'bowman' is the definition.
(synonyms)
'miles away from infantryman?' is the wordplay.
'miles' becomes 'm' (common abbreviation).
'away from' indicates named letters should be taken away.
'infantryman?' becomes 'marcher' ('marcher' can be a synonym of 'infantryman').
'marcher' with 'm' removed is 'ARCHER'.
(Other definitions for archer that I've seen before include "part of circle woman's joined" , "Toxophilist" , "User of bows and arrows" , "Bowman - ex-candidate for London Mayor" , "Tell perhaps" .)