Long, Narrow Crack in a Rock
This page is the CodyCross answer for the clue below from The 70's, Group 321, Puzzle 5 (Disco Music).
Question is: Long, Narrow Crack in a Rock
and the answer is: FISSURE
Word Meaning:
FISSURE — A long, narrow crack or opening made by breaking or splitting, especially in rock or earth.
Definitions from Wiktionary.