Gesture of Agreement Done by Moving the Cranium

This page is the CodyCross answer for the clue below from Concert Hall, Group 595, Puzzle 2 (Pre Concert Tuning).

Question is: Gesture of Agreement Done by Moving the Cranium

and the answer is: HEADNOD

Word Meaning:

HEAD — (countable) The part of the body of an animal or human which contains the brain, mouth, and main sense organs.

Definitions from Wiktionary.