Witness or an Onlooker

This page is the CodyCross answer for the clue below from Greece, Group 675, Puzzle 1 (Mykonos Windmills).

Question is: Witness or an Onlooker

and the answer is: BYSTANDER

Word Meaning:

BYSTANDER — A person who, although present at some event, does not take part in it; an observer, witness, or spectator.

Definitions from Wiktionary.