Pet Rodent That Runs Aimlessly on a Wheel

This page is the CodyCross answer for the clue below from Fauna and Flora, Group 180, Puzzle 3 (Fungus and Mushrooms).

Question is: Pet Rodent That Runs Aimlessly on a Wheel

and the answer is: HAMSTER

Word Meaning:

HAMSTER — Any of various Old World rodent species belonging to the subfamily Cricetinae.

Definitions from Wiktionary.