| Unfilled spaces | 15 |
| Unfilled time slot abbr. | 24 |
| Unfilled truck shpmt. | 21 |
| Unfilled-in | 11 |
| Unfilled-slot abbr. | 19 |
| Unfilled-time-slot letters | 26 |
| Unfinished | 10 |
| Unfinished Anthony Burgess work about a punctual primate? | 57 |
| Unfinished business | 19 |
| Unfinished business? | 20 |
| Unfinished Charles Darwin work about mints? | 43 |
| Unfinished details | 18 |
| Unfinished dollar sign | 22 |
| Unfinished framework | 20 |
| Unfinished furniture? | 21 |
| Unfinished Henry James work about Gainsborough's "Blue Boy"? | 74 |
| Unfinished Ian Fleming work about James Bond's affection for his boss? | 74 |
| Unfinished James Grady work about time-sharing? | 47 |
| Unfinished joint | 16 |
| Unfinished Kafka novel | 22 |
| Unfinished Norman Mailer work about strip-searching narcotics smugglers? | 72 |
| Unfinished novel? | 17 |
| Unfinished or uncouth | 21 |
| Unfinished poem by Keats | 24 |
| Unfinished Pound epic | 21 |
| Unfinished Rudyard Kipling work about a future son-in-law? | 58 |
| Unfinished software releases | 28 |
| Unfinished statue | 17 |
| Unfinished threat | 17 |
| Unfinished trilogy by Frank Norris | 34 |
| Unfinished works of art | 23 |
| Unfirm | 6 |
| Unfit | 5 |
| Unfit dweebs? | 13 |
| Unfit for | 9 |
| Unfit for consumption | 21 |
| Unfit for detail work | 21 |
| Unfit for farming | 17 |
| Unfit for farming, in a way | 27 |
| Unfit for growing | 17 |
| Unfit for highborn Brits | 24 |
| Unfit for use | 13 |
| Unfit for youngsters | 20 |
| Unfit Manhattanites? | 20 |
| Unfit one | 9 |
| Unfit to eat | 12 |
| Unfit to ingest | 15 |
| Unfit to swim in | 16 |
| Unfitting | 9 |
| Unfixable, as a car | 19 |
| Unfixed | 7 |
| Unfixed neckwear? | 17 |
| Unflappable | 11 |
| Unflappable one | 15 |
| Unflappable types | 17 |
| Unflashy | 8 |
| Unflashy coat | 13 |
| Unflashy color | 14 |
| Unflattering | 12 |
| Unflattering comparison for a fruitcake | 39 |
| Unflattering facial feature | 27 |
| Unflattering gossip | 19 |
| Unflattering metaphor for a female senior | 41 |
| Unflattering Nixon sobriquet | 28 |
| Unflattering pants | 18 |
| Unflattering photo, usually | 27 |
| Unflattering portrait | 21 |
| Unflattering revelations | 24 |
| Unflattering rumors | 19 |
| Unflattering shape | 18 |
| Unflattering type of cap | 24 |
| Unflattering word for a ship | 28 |
| Unflavored | 10 |
| Unflavorful sundae topper? | 26 |
| Unflawed | 8 |
| Unfledged | 9 |
| Unfledged bird | 14 |
| Unfledged hawk | 14 |
| Unfledged pigeon | 16 |
| Unflinching | 11 |
| Unflinching folks | 17 |
| Unflinching in the face of pain, say | 36 |
| Unflinchingly realistic | 23 |
| Unfluctuating | 13 |
| Unflustered | 11 |
| Unfocused apprehension | 22 |
| Unfocused attempt | 17 |
| Unfocused dread | 15 |
| Unfocused photo, e.g. | 21 |
| Unfocused sight | 15 |
| Unfocused uneasiness | 20 |
| Unfocused, as a novel | 21 |
| Unfold | 6 |
| Unfold a tale | 13 |
| Unfold anew | 11 |
| Unfold, as a rose | 17 |
| Unfold, in poesy | 16 |
| Unfold, in poetry | 17 |
| Unfold, in verse | 16 |
| Unfold, poetically | 18 |