Most People Use This Body Part to Wield a Pen

This page is the CodyCross answer for the clue below from Babies and Toddlers, Group 1676, Puzzle 5 (Smiling at You).

Question is: Most People Use This Body Part to Wield a Pen

and the answer is: RIGHTHAND

Word Meaning:

RIGHT HAND — (figurative) A trusted assistant.

Definitions from Wiktionary.