Rock for Sharpening Tools
This page is the CodyCross answer for the clue below from Working From Home, Group 1240, Puzzle 4 (Negotiations).
Question is: Rock for Sharpening Tools
and the answer is: WHETSTONE
Word Meaning:
WHETSTONE — A sharpening stone; a hard stone or piece of synthetically bonded hard minerals that has been formed with at least one flat surface, used to sharpen or hone an edged tool.
Definitions from Wiktionary.