Adviser puts soldiers on hill (6)
I believe the answer is:
mentor
'adviser' is the definition.
(I've seen this before)
'soldiers on hill' is the wordplay.
'soldiers' becomes 'men' (I've seen this before).
'on' means one lot of letters go next to another.
'hill' becomes 'tor' (tor is a kind of hill).
'men'+'tor'='MENTOR'
'puts' is the link.
(Other definitions for mentor that I've seen before include "Merton (anag.)" , "Experienced adviser" , "One who steers" , "A wise and experienced teacher" , "Guru" .)