| Answer | Crossword Clue |
|---|---|
| DATER | Instrument in post office. |
| CANCELER | Post office instrument. |
| DATER | Post office instrument. |
| PRESTO | Immediately relax in post office (6) |
| NIXIE | Undeliverable letter, in post-office talk |
| MAILS | Drops in a post office slot |
| NIXIE | Dead letter, in post office talk |
| NIXIE | Undeliverable letter, in post-office slang |
| BUBBLEWRAP | It might pop in the post office |
| KISS | Forfeit in a game of post office. |
| SENDER | One in line at the post office |
| POB | Numbered compartment in a post office, briefly |
| SORT | Work at the post office, in a way |
| FLAGPOLESTING | Undercover operation carried out in front of a post office? |
