You'll Burn This Oil by Working Late at Night
This page is the CodyCross answer for the clue below from Ballroom Dancing, Group 1922, Puzzle 4 (Minuet and Quadrille).
Question is: You'll Burn This Oil by Working Late at Night
and the answer is: MIDNIGHT
Word Meaning:
MIDNIGHT — The middle of the night: the sixth temporal hour, equidistant between sunset and sunrise.
Definitions from Wiktionary.