Much written about a manuscript (5)
I believe the answer is:
reams
'much written about a manuscript' is the definition.
I can't judge whether this definition defines the answer.
'about a manuscript' is the wordplay.
'about' becomes 'rea' (I've seen this in other clues).
'a manuscript' becomes 'ms' (abbreviation for manuscript).
'rea'+'ms'='REAMS'
Can you help me to learn more?
(Other definitions for reams that I've seen before include "a very large amount" , "Scrapes the barrel" , "This much paperwork" , "Large quantity of written matter" , "Lots of paper" .)