Long Crack Along a Rock
This page is the CodyCross answer for the clue below from Train Travel, Group 709, Puzzle 3 (Strangers on a Train).
Question is: Long Crack Along 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.