| Clue | Source | Date |
|---|---|---|
| Obstruct the mail in capitals | ||
| Cursive alternative, and the starts of the starred answers, phonetically | Wall Street Journal | 08 Sep 2021 |
| Obstruct mail in capitals | The Telegraph Cryptic | 27 Jun 2016 |
| SOUNDS LIKE A STRATEGY FOR POSTMAN ON STRIKE, for example | Irish Times Crosaire | 12 Jun 2015 |
| They're plainly drawn | ||
| Features of many signs |