Documents of a remustered sapper (6)
I believe the answer is:
papers
'documents of' is the definition.
'papers' can be an answer for 'documents' (I've seen this in another clue). I am not certain of the 'of' bit.
'a remustered sapper' is the wordplay.
'sapper' can be anagrammed to 'PAPERS'.
However, I'm not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for papers that I've seen before include "Identifying documents" , "Print media" , "ID etc." , "Documents; the press" , "tabloids, maybe" .)