If It's as Dead as a __, Then It's Dead Indeed
This page is the CodyCross answer for the clue below from Inventions, Group 60, Puzzle 4.
Question is: If It's as Dead as a __, Then It's Dead Indeed
and the answer is: DOORNAIL
Word Meaning:
DOORNAIL — A nail with a wide head, traditionally used in the construction and ornamentation of wooden doors.
Definitions from Wiktionary.