Not a civil description of soldiers (8)
I believe the answer is:
military
'of soldiers' is the definition.
The definition suggests a singular noun which matches the answer.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for military that I've seen before include "Relating to armed forces" , "Relating to soldiers or war" , "Of soldiers and warfare" , "in the field" , "Relating to the army" .)