Minister finished with soldiers (6)
I believe the answer is:
pastor
'minister' is the definition.
('pastor' can be a synonym of 'minister')
'finished with soldiers' is the wordplay.
'finished' becomes 'past'.
'with' says to put letters next to each other.
'soldiers' becomes 'or' (Other Rank).
'past'+'or'='PASTOR'
(Other definitions for pastor that I've seen before include "Padre perhaps" , "Member of the clergy" , "A sport (anag)" , "Christian minister" , "Minister of religion" .)