| Canyon phenomenon |
| Coastal phenomenon |
| Ninth-largest body directly orbiting the Sun |
| Pre-migraine headache phenomenon |
| Agricultural phenomenon sometimes linked to UFOs |
| Autumn lunar phenomenon |
| Alpine phenomenon |
| Phenomenon observed in receding galaxies ... and in the answers to this puzzle's asterisked clues? |
| Pop culture phenomenon |
| Stock market phenomenon |
| Eerie phenomenon |
| First light ... or a phenomenon suggested by this puzzle's seven sets of circled letters? |
| Depression phenomenon |
| Acoustic phenomenon |
| Eclipse phenomenon. |
| Polar region phenomenon |
| Phenomenon of the Colorado River. |
| Excavator overlooked secondary weather phenomenon |
| Unexplained phenomenon |
| Orbiting phenomenon |
| Static phenomenon |
| Rare bond-market phenomenon |
| Cosmic phenomenon |
| Late 1990s Nasdaq phenomenon |
| Summer arctic phenomenon |
| Limestone cavern phenomenon |
| Monsoon-affecting phenomenon |
| Pre-migraine phenomenon, for some |
| Fall phenomenon |
| Moon phenomenon |