To Lose One Over a Cliff Is Unlucky
Puzzle 7 of Travel Souvenirs Medium Pack
Question is: To Lose One Over a Cliff Is Unlucky
and the answer is: LEMMING
Word Meaning:
LEMMING — A small arctic and subarctic rodent of the tribes Lemmini, Dicrostonychini and Lagurini.
Definitions from Wiktionary.