Adding Essential Oil to a Carrier So It's Not Neat

This page is the CodyCross answer for the clue below from Comics, Group 1074, Puzzle 4 (Bound Copies).

Question is: Adding Essential Oil to a Carrier So It's Not Neat

and the answer is: DILUTION

Word Meaning:

DILUTION — The process of making something dilute.

Definitions from Wiktionary.