| FIRSTDAYCOVER | A letter with a stamped postmark on the date a new stamp is released (5,3,5) |
| MINT | New stamp is to have some flavour (4) |
| ANTISPAM | A new stamp I designed, helping to identify unwanted mail (4-4) |
| PRINT | A moulded pat of butter; a textile with a stamped pattern of dye; a copy or reproduction of an original painting; or, a book or newspaper (5) |
| SEAL | Wax with a stamped design |
| SAE | Offering from Mensa enclosed with a stamped addressed envelope (3) |
| UNRELENTINGLY | Mercilessly imagined evicting a letter with a mild thrill |
| PREMEDITATING | Priming it on the date 'ET' was shown or deliberating beforehand? (13) |
| CORRESPONDING | Exchanging letters, ... with a pen pal |
| INK | It's what an early settler writing a letter with a quill pen would smell while writing it |
| IMPRESSION | A vague idea or unfounded belief; a parody of take-off; a print run; or, a stamped mark, either on a physical object or on the mind (10) |
| SENT | Dispatch a letter with a purpose (4) |
| GOATEED | Revered figure, penning a letter, with a small beard (7) |
| CHI | Only Greek letter with the same number of letters after it in the Greek alphabet as the letter with a very similar capital form has in the English alphabet |
| POSTMANPAT | In Greendale, I may bring you a letter with novel stamp on connected with Father Time (7,3) |
| COVER | Jacket of a book; an envelope complete with stamp and postmark;or the top blanket of a bed (5) |
| FRANKED | Stamped with a postmark to indicate the date and time of mailing (7) |
| PASTMASTER | He designed the new stamp; a flower. He's very good (4,6) |
| DESTRY | Kill, rejecting love, on right date - a profit for a 2 picture (6,5,5) |
| GODETIA | Leave on the date I arranged, from the plant (7) |
