"burning the __ Oil" Means Working Late
This page is the CodyCross answer for the clue below from Architectural Styles, Group 1176, Puzzle 1 (Reichstag Building).
Question is: "burning the __ Oil" Means Working Late
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.