| Rocky Mountains feline | 22 |
| One sometimes called a cougar | 29 |
| Member of the genus Felis | 25 |
| Feline native to the Americas | 29 |
| Cousin of a jaguarundi | 22 |
| Brand worn by Usain Bolt | 24 |
| PowerCat soccer cleats, e.g. | 28 |
| Mountain felines or sneakers | 28 |
| Mountain cats or sneakers | 25 |
| Endangered bighorn stalkers | 27 |
| Stone used in pedicures | 23 |
| Stone used by pedicurists | 25 |
| Pedicurist's stone | 22 |
| Stuff in pencil erasers | 23 |
| Rock used for polishing | 23 |
| Hardened volcanic froth | 23 |
| Common exfoliant ingredient | 27 |
| Service station fixture | 23 |
| The heart, essentially | 22 |
| It's well-connected | 23 |
| It may cause inflation | 22 |
| Human heart, basically | 22 |
| Shoe thrown by a jilted lass? | 29 |
| Interrogates relentlessly | 25 |
| They're well-connected | 26 |
| Some women's shoes | 22 |
| Service-station fixtures | 24 |
| Service station fixtures | 24 |
| Gas station dispensers | 22 |
| It may not be intended | 22 |
| Essence of many a punch line | 28 |
| Essence of a knock-knock joke | 29 |
| Yuckster's specialty | 24 |
| This puzzle's title, e.g. | 29 |
| Sometimes it's funny | 24 |
| Paronomastic witticism | 22 |
| One may not be intended | 23 |
| Many a New York Post headline | 29 |
| Many a joke involves one | 24 |
| Many a Groucho Marx quip | 24 |
| Knock-knock joke, usually | 25 |
| Knock-knock joke, essentially | 29 |
| Knock-knock joke, e.g. | 22 |
| Knock-knock joke payoff | 23 |
| Knock-knock joke basis | 22 |
| It seldom made Cerf bored | 25 |
| It may not have been intended | 29 |
| It may involve a homophone | 26 |
| Groan-producing wordplay | 24 |
| Crossword answer, at times | 26 |
| Cause of a smile, maybe | 23 |
| Alexander the Grape, e.g. | 25 |
| "The HarBowl," e.g. | 29 |
| Half of a famous puppet team | 28 |
| Contents of a big bowl | 22 |
| British satire magazine | 23 |
| Beverage in a big bowl | 22 |
| Kids' puppet show script? | 29 |
| Political talk show guest | 25 |
| Put in a corner, perhaps | 24 |
| Penalty inflicters, e.g. | 24 |
| The Ramones' music | 22 |
| Music to slam dance to | 22 |
| Jello Biafra's genre | 24 |
| The Sex Pistols' genre | 26 |
| Very slow-burning, as a fire | 28 |
| Painful plays on words | 22 |
| Groucho Marx specialties | 24 |
| They often elicit groans | 24 |
| Staple of Ogden Nash poems | 26 |
| Some Groucho Marx humor | 23 |
| Some George Carlin jokes | 24 |
| Puzzle clues, sometimes | 23 |
| Many Groucho Marx quips | 23 |
| Many conundrums have them | 25 |
| Jokesters' standbys | 23 |
| Jokes that lead to groans | 25 |
| Groan elicitors, often | 22 |
| Essence of knock-knock jokes | 28 |
| Causes of grins and groans | 26 |
| Fourth-down decision, often | 27 |
| Fourth-down play, often | 23 |
| Usual fourth-down play | 22 |
| Usual fourth down play | 22 |
| Pass the buck, informally | 25 |
| Many a fourth-and-long call | 27 |
| Give up on fourth down | 22 |
| Fourth and long strategy | 24 |
| Equivocate, so to speak | 23 |
| Admit defeat, in a way | 22 |
| Fourth-down specialist | 22 |
| Fourth-down player, often | 25 |
| Boat propeller, of a sort | 25 |
| Hardly he-man material | 22 |
| Totally unlike a muscleman | 26 |
| Like the runt of the litter | 27 |
| Like a weakling's muscles | 29 |
| White-furred seal, perhaps | 26 |
| Pick of the litter, at times | 28 |
| Many a shelter adoptee | 22 |