Rust a balcony developed in place for officers? (12)
I believe the answer is:
constabulary
'place for officers?' is the definition.
(as in police constables)
'rust a balcony developed' is the wordplay.
'developed' is an anagram indicator.
'rust'+'a'+'balcony'='rustabalcony'
'rustabalcony' is an anagram of 'CONSTABULARY'.
'in' is the link.
(Other definitions for constabulary that I've seen before include "14 6 or 2" , "Police force or station" .)