Perhaps, armed forces immorality... operating in absence of Medical Officer (8)
I believe the answer is:
military
'officer' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for military that I've seen before include "Relating to the army" , "Of soldiers and warfare" , "Relating to soldiers or war" , "Related to soldiering" , "Relating to armed forces" .)