Answer:

mss

Answer	Crossword Clue
MSS	Contents of Ed's. inbox
MSS	Reading for 65A
MSS	Writers' submissions: Abbr.

MSS	Authors' submissions: Abbr.
MSS	Content of a SASE, perhaps
MSS	Ed.'s in-boxful
MSS	Writer's submission, in short
MSS	Author's typed wks.
MSS	Ed.'s reading material
MSS	Ed.'s trayful
MSS	Ed.'s mail

MSS	Orig. copies
MSS	Submissions to the New Yorker, e.g.: Abbr.
MSS	What eds. read
MSS	Writers' output (abbr.)
MSS	Writer's submissions (abbr.)
MSS	Authors' papers (abbr.)
MSS	Ed.'s workload
MSS	Potential bks.

MSS	Unpublished bks.
MSS	Stack on an ed.'s desk
MSS	Ed.'s in-box fill
MSS	Ed.'s stack
MSS	Slush pile's contents: abbr.
MSS	Pub. house submissions
MSS	Submissions to an ed.
MSS	Ed.'s pile

MSS	Ed.'s work pile
MSS	Authors' output: Abbr.
MSS	Ed.'s piles
MSS	Bks.-to-be
MSS	Ed.'s concerns
MSS	Submissions to eds.
MSS	Money pile?: Abbr.
MSS	Auth.'s submissions

MSS	Ed.'s workload items
MSS	Bks. in progress
MSS	Eds. mark them up
MSS	Orig. texts
MSS	What eds. edit