Bend Elbow and Snap Out to Side With Knuckles

This page is the CodyCross answer for the clue below from Performing Arts, Group 898, Puzzle 1 (Actor Rituals).

Question is: Bend Elbow and Snap Out to Side With Knuckles

and the answer is: BACKFIST

Word Meaning:

BACKFIST — A punch performed by forming a fist and striking with the tops of the two largest knuckles.

Definitions from Wiktionary.