Exterminator's Tool
This page is the CodyCross answer for the clue below from Pet Shop, Group 354, Puzzle 4 (Knotted Bones).
Question is: Exterminator's Tool
and the answer is: PESTICIDE
Word Meaning:
PESTICIDE — Anything, especially a synthetic substance but also any substance (e.g. sulfur), or virus, bacterium, or other organism, which kills or suppresses the activities of pests.
Definitions from Wiktionary.