Body soldier (8)
I believe the answer is:
corporal
This clue could be a double definition.
'body' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'soldier' is the second definition.
Can you help me to learn more?
(Other definitions for corporal that I've seen before include "Non-commissioned officer below sergeant" , "characterising a body" , "NCO rank below sergeant" , "Of the body, like NCO" , "Like old-fashioned punishment" .)