Answer: SASE

AnswerCrossword Clue
SASESubmission encl.
SASEReady-to-mail item, briefly
SASEEd.'s requirement
SASEMs. enclosure
SASEEd.'s request
SASEFreelancer's encl. (m)
SASEInvitation encl.
SASEEncl. with a manuscript
SASEFreelancer's enc.
SASELetter-bottom letters
SASEReady-to-mail item: Abbr.
SASEAuthor's encl.
SASEEncl. with an autograph request
SASEAn ed. expects one
SASEReturn mail requirement (abbr.)
SASEEd.'s request, often
SASELetter encl.
SASEPostpaid enc.
SASEAccompaniment for a ms.
SASEEncl. for a reply
SASEBusiness reply encl.
SASEEnclosure with a MS
SASERSVP enclosure
SASEWriter's enclosure
SASEEncl. with a mailed autograph request
SASECourtesy sent for replies: Abbr.
SASEManuscript encl.
SASEEditor's request (abbr.)
SASEMS. enclosure
SASEEnvelope encl.
SASEPostpaid encl.
SASELetter enc.
SASEMS enclosure
SASEConvenient encl.
SASEIt might accompany an MS
SASEEd's request
SASEManuscript enc.
SASEMs. insert
SASEEnc. to an editor
SASEFreelancer's encl.