Crab That Hides in Others' Shells
This page is the CodyCross answer for the clue below from Train Travel, Group 702, Puzzle 4 (Reservations).
Question is: Crab That Hides in Others' Shells
and the answer is: HERMIT
Word Meaning:
HERMIT — A religious recluse; someone who lives alone for religious reasons; an eremite.
Definitions from Wiktionary.