Quarters? A unit soldiers finally get (9)
I believe the answer is:
apartment
'quarters?' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for apartment that I've seen before include "Set of rooms or American flat" , "Room ? flat" , "Suite of rooms to live in" , "Accommodation" , "Penthouse" .)