Understands, Realizes What's Happening

This page is the CodyCross answer for the clue below from African grasslands, Group 1550, Puzzle 5 (Fungi and Termites).

Question is: Understands, Realizes What's Happening

and the answer is: COTTONSON

Word Meaning:

COTTONS ON — third-person singular simple present indicative of cotton on

Definitions from Wiktionary.