Discharges from the army? (7)
I believe the answer is:
gunfire
'discharges from the army?' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for gunfire that I've seen before include "Sound of shooting" , "Repeated shooting" , "Sound of. eg. rifles" , "Weaponry noise" , "Sound of shots" .)