ISTH
| Date | Clue |
|---|---|
| 2017-03-12 | Panama, e.g.: Abbr. |
| 2015-08-08 | Neck: Abbr. |
| 2012-03-30 | Common canal locale: Abbr. |
| 2010-05-20 | Narrow strip of land: Abbr. |
| 2007-11-04 | Transcontinental bridge, e.g.: Abbr. |
| 2005-01-12 | Panama, e.g.: Abbr. |
| 2004-07-25 | Neck of land: Abbr. |
| 2004-03-31 | Canal locale: Abbr. |
| 2002-12-26 | Narrow strait of land: Abbr. |