Emotional Reflex of the Mouth to Show Happiness

This page is the CodyCross answer for the clue below from A Sweet Life, Group 1088, Puzzle 5 (Candy Canes).

Question is: Emotional Reflex of the Mouth to Show Happiness

and the answer is: SMILING

Word Meaning:

SMILING — That smiles or has a smile.

Definitions from Wiktionary.