Sphere in a Pointing Device That Acts as a Cursor

This page is the CodyCross answer for the clue below from Train Travel, Group 706, Puzzle 5 (Falling Asleep).

Question is: Sphere in a Pointing Device That Acts as a Cursor

and the answer is: TRACKBALL

Word Meaning:

TRACKBALL — (computing) A pointing device consisting of a ball housed in a socket

Definitions from Wiktionary.

Sphere In A Pointing Device That Acts As A Cursor - Train Travel CodyCross Answers | CodyCross Solutions