- Curious passer-by - Newspaper witness - One who looks on - Watcher - Witness Serb rove around - One who observes, or pays attention to, anything;
especially, one engaged in, or trained to habits of, close and exact
observation; as, an astronomical observer. - One who keeps any law, custom, regulation, rite, etc.;
one who conforms to anything in practice.
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Related crossword clues one who looks after others