Officer's not particular (7)
I believe the answer is:
general
This clue is a double definition.
'officer's' is the first definition.
(general is a kind of officer)
'not particular' is the second definition.
(I've seen this in another clue)
(Other definitions for general that I've seen before include "Of wide application" , "Not partial, local or particular like army chief" , "Not particular or specific" , "blanket" , "Rank; normal, usual" .)