SPYON
| Date | Clue |
|---|---|
| 2023-09-13 | Shadow, e.g. |
| 2023-05-07 | Secretly surveil |
| 2022-01-22 | Secretly watch |
| 2021-01-26 | Watch surreptitiously |
| 2019-10-24 | Watch surreptitiously |
| 2015-10-03 | Shadow, e.g. |
| 2012-02-07 | Observe secretly |
| 2010-06-09 | Watch furtively |
| 2008-11-30 | Watch furtively |
| 2008-08-04 | Watch through binoculars, say |
| 2007-04-01 | Observe furtively |
| 2006-06-04 | Secretly watch |
| 2005-12-12 | Observe furtively |
| 2003-10-03 | Secretly watch |
| 2002-03-29 | Watch slyly |
| 1999-12-20 | Watch secretly |
| 1998-01-21 | Secretly watch |