About to get a manuscript — lots of sheets (5)
I believe the answer is:
reams
'lots of sheets' is the definition.
'reams' can be an answer for 'lots' (I've seen this in another clue). I am not certain of the 'of sheets' bit.
'about to get a manuscript' is the wordplay.
'about to get' becomes 're' (I've seen this in other clues).
'manuscript' becomes 'ms' (abbreviation for manuscript).
're'+'a'+'ms'='REAMS'
Can you help me to learn more?
(Other definitions for reams that I've seen before include "a very large amount" , "Large quantity of written matter" , "This much paperwork" , "Large quantities (of paper?)" , "Scrapes the barrel" .)