Soldier's retiring? (7)
I believe the answer is:
private
This clue is a double definition.
'soldier's' is the first definition.
(I've seen this before)
'retiring?' is the second definition.
(thesaurus)
(Other definitions for private that I've seen before include "Soldier; personal" , "Not to be shared or revealed" , "Confidential sort of soldier" , "Secret, not public" , "Army rank; secluded" .)