Answer: mss

AnswerCrossword Clue
MSSEd.'s concerns
MSSEd.'s in-box fill
MSSEd.'s stack
MSSSlush pile's contents: abbr.
MSSPub. house submissions
MSSSubmissions to an ed.
MSSEd.'s pile
MSSEd.'s work pile
MSSAuthors' output: Abbr.
MSSEd.'s piles
MSSBks.-to-be
MSSStack on an ed.'s desk
MSSSubmissions to eds.
MSSMoney pile?: Abbr.
MSSAuth.'s submissions
MSSEd.'s workload items
MSSBks. in progress
MSSEds. mark them up
MSSOrig. texts
MSSWhat eds. edit
MSSPile at a publisher: Abbr.
MSSEd.'s mail
MSSReading for 65A
MSSWriters' submissions: Abbr.
MSSAuthors' submissions: Abbr.
MSSContent of a SASE, perhaps
MSSEd.'s in-boxful
MSSWriter's submission, in short
MSSAuthor's typed wks.
MSSEd.'s reading material
MSSEd.'s trayful
MSSContents of Ed's. inbox
MSSOrig. copies
MSSSubmissions to the New Yorker, e.g.: Abbr.
MSSWhat eds. read
MSSWriters' output (abbr.)
MSSWriter's submissions (abbr.)
MSSAuthors' papers (abbr.)
MSSEd.'s workload
MSSPotential bks.