| 100% | DESIGNATE | 9 | Appoint someone to a specified post or office |
| 46% | ERRAND | 6 | Grocery shopping or a trip to the post office, e.g. |
| 44% | 4WARDINGADDRESS | 15 | Something to leave at the post office ... or a hint to this puzzle's theme? |
| 44% | LETTER | 6 | With 9-Across, post office mail slot ... or a hint to this puzzle's theme |
| 42% | DESIGNATED | 10 | Appointed to a specific post |
| 41% | LETTERDROP | 10 | Opening at the post office ... or, when read as three words, a hint to the answers to the starred clues |
| 41% | SENT | 4 | Posted a letter to someone |
| 40% | CLERICAL | 8 | Related to office work or a religious office |
| 40% | MAIL | 4 | What's delivered to a post office box |
| 40% | DISOBEY | 7 | To defy someone or a command |
| 40% | TENURE | 6 | To give someone a permanent teaching post |
| 40% | HATE | 4 | To dislike something or someone a lot |
| 40% | ENSLAVE | 7 | To make someone or something a drudger |
| 40% | ADMONISH | 8 | To caution or give someone a warning |
| 39% | ASSIGN | 6 | To give or designate a task to someone |
| 39% | UNDERDOG | 8 | Someone expected to lose a contest or battle |
| 39% | ODE | 3 | A literary piece dedicated to someone or something |
| 39% | CHARGE | 6 | To impose a price or fee on someone |
| 39% | BANISH | 6 | To outcast or send someone away from a place |
| 38% | APPOINT | 7 | Assign a job or role to someone |
| 38% | ROOKIE | 6 | Someone new to a job or team |
| 38% | MEDICINE | 8 | A pill or cream used to improve someone's health |
| 38% | SCALE | 5 | Instrument found in a post office or grocery |
| 38% | TWEET | 5 | Alternative to a Facebook status or Instagram post |
| 38% | BUGGING | 7 | Adding a listening device to something or someone |
| 38% | BEWITCHED | 9 | Under a spell or charmed to like someone |
| 38% | AID | 3 | To lend a hand, or rescue someone. |
| 38% | DISCIPLINE | 10 | Train someone to obey ... or a word that means "area of academic focus" |
| 38% | SERENADE | 8 | To play music or sing a song for someone you love |
| 37% | EMAILED | 7 | Contacted without a trip to the post office, say |