Smart, Squeaky Water Mammal
This page is the CodyCross answer for the clue below from Train Travel, Group 708, Puzzle 4 (Agatha Christie).
Question is: Smart, Squeaky Water Mammal
and the answer is: DOLPHIN
Word Meaning:
DOLPHIN — A carnivorous cetacean with a beak-like snout, famed for their intelligence and occasional willingness to approach humans.
Definitions from Wiktionary.