Put a Letter Inside This Before Mailing It
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2178, Puzzle 5 (Cemetery and Crypt).
Question
Put a Letter Inside This Before Mailing It
Answer
ENVELOPE
Word Meaning:
ENVELOPE — A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.
Definitions from Wiktionary.