Turns up Virgil used it endlessly to sign out of total necessity

This crossword clue is for the definition: Turns up Virgil used it endlessly to sign out of total necessity.
it’s A 64 letters crossword puzzle definition.
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Possible Answers: VITAL.

Last seen on: Irish Times Crosaire – Sep 15 2020

Random information on the term “VITAL”:

VHDL-VITAL or simply VITAL, VHDL Initiative Towards ASIC Libraries, refers to the IEEE Standard 1076.4 Timing.

VITAL on Wikipedia