Sky-Wide Flash That Accompanies Thunder
This page is the CodyCross answer for the clue below from Australia, Group 1018, Puzzle 2 (The Pinnacles).
Question is: Sky-Wide Flash That Accompanies Thunder
and the answer is: LIGHTNING
Word Meaning:
LIGHTNING — A flash of light produced by short-duration, high-voltage discharge of electricity within a cloud, between clouds, or between a cloud and the earth.
Definitions from Wiktionary.