Enter a clue or pattern or both:
The Clue
Letter accompanier: Abbr. (3 letter answer)
The Answer
ENC
Tags
Notes
The answer ENC is seen frequently, appearing about once every 140 puzzles.
Related Clues
S.A.S.E., for one
Abbr. with a check
Env. extra
Fenced in: Abbr.
Insert: Abbr.
Letter abbr.
Ltr. accompanier
Ref. book
Ref. work
Reference bk.
S.A.S.E., e.g.
SASE, e.g.
Abbr. at the bottom of a letter
Bus.-letter abbr.
Bus.-ltr. abbr.
Business letter abbr.
Business-letter abbr.
Direct mail abbr.
Letter-ending abbr.
Stamped return env., e.g.