Bring back soldiers to home, say (9)
I believe the answer is:
reinstate
'bring back' is the definition.
(I've seen this before)
'soldiers to home say' is the wordplay.
'soldiers' becomes 're' (Royal Engineers).
'to home' becomes 'in' ('he's home' can mean 'he's in').
'say' becomes 'state' ('state' can be a synonym of 'say'**).
're'+'in'+'state'='REINSTATE'
(Other definitions for reinstate that I've seen before include "Restore, put back" , "Restore to a former condition" , "Give back" , "Bring back" , "Restore to previous position" .)