Solutions An unnoticed observer has 6 entries with similar clues
- drspatient observers: abbr.
- amazeGraduate in not finishing Observer crossword shock!
- voyeurNaughty observer
- bystanderObserver of hubby's tan - dermatology centre
- astronomerSky-at-night observer
- albert-abraham-michelsonThe physicist who experimentally proved that the measured speed of light was unaffected by the motion of the observer