| Carry a tune without words | 26 |
| Symptom for a car mechanic | 26 |
| Sign of smooth operation | 24 |
| Run smoothly, as a machine | 26 |
| Proceed without the words | 25 |
| Had smash "Stars" | 27 |
| Forget the words maybe | 23 |
| Forget the lyrics, maybe | 24 |
| Fail to know the words, maybe | 29 |
| Continue without the words | 26 |
| Be at a loss for words? | 23 |
| Annoying speaker problem | 24 |
| Accompany musically, maybe | 26 |
| Anthropoid's cousin | 23 |
| "To err is ___" | 25 |
| What "to err" is | 26 |
| Type of corporate resources | 27 |
| The "H" of HR | 23 |
| Morris's naked ape | 22 |
| Like Spock's mother | 23 |
| Error-prone, so they say | 24 |
| Capable of making mistakes | 26 |
| "To err is __" | 24 |
| "Star Trek" race | 26 |
| "Of ___ Bondage" | 26 |
| Neuroscientist's focus | 26 |
| All people are part of it | 25 |
| Ordinary dinner bread? | 22 |
| Cronyn of "Cocoon" | 28 |
| Scottish philosopher David | 26 |
| Scottish philosopher: 1711-76 | 29 |
| Scottish Enlightenment figure | 29 |
| He inspired Kant and Einstein | 29 |
| Famed Scottish philosopher | 26 |
| Edinburgh-born philosopher | 26 |
| Cronyn in "Cocoon" | 28 |
| Big name in skepticism | 22 |
| Shoulder-to-elbow bone | 22 |
| Raising a sweat, perhaps | 24 |
| One of the three HÂ’s | 24 |
| Like St. Louis in August | 24 |
| Like mid-August weather | 23 |
| Like August weather, perhaps | 28 |
| One at a loss for words? | 24 |
| It's good for a laugh | 25 |
| What this is all about | 22 |
| It's a funny thing | 22 |
| Bookstore aisle, perhaps | 24 |
| Will Rogers's forte | 23 |
| Quality of novelty songs | 24 |
| Bob Hope's specialty | 24 |
| Satisfied another's whim | 28 |
| "Just try it" | 23 |
| 'Just try it!' | 22 |
| Quasimodo's affliction | 26 |
| Wednesday, figuratively | 23 |
| Day some call Wednesday | 23 |
| Camel's back feature | 24 |
| It can be hard to get over | 26 |
| Himalayas, to W.W. II fliers | 28 |
| Good thing to get over | 22 |
| "See if I care!" | 26 |
| "If you say so" | 25 |
| Sound of doubt or disdain | 25 |
| Camel rider's attire? | 25 |
| Forgets the words, maybe | 24 |
| Runs well, as an engine | 23 |
| Is at a loss for words? | 23 |
| Doesn't quite sing | 22 |
| Symptoms for a car mechanic | 27 |
| Sings with closed mouth | 23 |
| Sings with a closed mouth | 25 |
| Sings along without words | 25 |
| Plays a kazoo, basically | 24 |
| Performs musically sans words | 29 |
| Keeps one's mouth shut? | 27 |
| Fertile soil ingredient | 23 |
| Soil's decaying matter | 26 |
| Organic portion of soil | 23 |
| Military vehicle arrangement? | 29 |
| Member of Attila's horde | 28 |
| Part of Attila's legion | 27 |
| Nomadic invader of yore | 23 |
| Fifth-century marauder | 22 |
| Ancient steppe warrior | 22 |
| Province of southern China | 26 |
| Changsha's province | 23 |
| Changsha is its capital | 23 |
| Style of Chinese cuisine | 24 |
| Province of central China | 25 |
| Hot Chinese cuisine style | 25 |
| Work on at a desk, say | 22 |
| Detective's sixth sense | 27 |
| Home for Pooh and Tigger | 24 |
| Square race for the swift | 25 |
| Unable to reach a verdict | 25 |
| Unable to reach a decision | 26 |
| Put up against the wall | 23 |
| Inconclusive, as a jury | 23 |
| Well-endowed, as it were | 24 |