Papers about soldier (6)
I believe the answer is:
sapper
'soldier' is the definition.
(I've seen this before)
'papers about' is the wordplay.
'about' indicates anagramming the letters.
'papers' with letters rearranged gives 'SAPPER'.
(Other definitions for sapper that I've seen before include "Writer" , "Army engineer" , "Something that wears down" , "Royal Engineer" , "Military miner" .)