| Pipeline attachments | 20 |
| Oil extractors | 14 |
| Interrogates relentlessly | 25 |
| High heels, often | 17 |
| Gas dispensers | 14 |
| Water raisers | 13 |
| Tire-filling machines | 21 |
| Tire inflators | 14 |
| Tickers | 7 |
| They're well-connected | 26 |
| Sorts of shoes | 14 |
| Some women's shoes | 22 |
| Some dress shoes | 16 |
| Shell collection? | 17 |
| Service-station fixtures | 24 |
| Service station fixtures | 24 |
| Reebok innovation of the early 1990s | 36 |
| Psychs (up) | 11 |
| Lifts in a gym? | 15 |
| Inflation causes | 16 |
| High-heel shoes | 15 |
| Gas station fixtures | 20 |
| Gas station dispensers | 22 |
| Fountain feeders | 16 |
| Formal dress shoes | 18 |
| Fills the gas tank | 18 |
| 1987 dance hit single by M/A/R/R/S | 34 |
| "The radio's not loud enough" | 43 |
| Shout to a timid DJ? | 20 |
| Shout to a DJ | 13 |
| Cry to a DJ, perhaps | 20 |
| Play on words | 13 |
| "A seven-day diet makes one weak," e.g. | 49 |
| Groan inducer | 13 |
| Bit of wordplay | 15 |
| Equivoque | 9 |
| Wordplay groaner | 16 |
| Word play | 9 |
| Wordplay | 8 |
| "Queen of denial," e.g. | 33 |
| Paronomasia | 11 |
| Jeu de mots | 11 |
| It may not be intended | 22 |
| Groaner | 7 |
| Groan cause | 11 |
| Crossword clue that might end with a question mark | 50 |
| Slain rapper Big ___ | 20 |
| Knock-knock joke punchline, usually | 35 |
| Groaner, sometimes | 18 |
| Groaner of a joke | 17 |
| Groan producer | 14 |
| Essence of many a punch line | 28 |
| Essence of a knock-knock joke | 29 |
| Calembour | 9 |
| Bad humor? | 10 |
| "I threw away my golf shoes when I got a hole-in-one," e.g. | 69 |
| "Don't be fuelish," for one | 41 |
| "Doing a crossword with a broken pencil is pointless," for example | 76 |
| "Canoe row a boat?" is one | 36 |
| ''My bike won't stand up. It's two tired,'' e.g. | 72 |
| Yuckster's specialty | 24 |
| Wordplay from Groucho | 21 |
| Wordplay bit | 12 |
| Word joke | 9 |
| What the French call "game of words" | 46 |
| Verbal groaner | 14 |
| Unit of wordplay | 16 |
| Tom Swifty, e.g. | 16 |
| This puzzle's title, e.g. | 29 |
| The title of this puzzle, e.g. | 30 |
| “The GOP Has a Koch Problem,” e.g. | 42 |
| Sometimes it's funny | 24 |
| Something that may not be intended | 34 |
| So-called "lowest form of wit" | 40 |
| So-called "lowest form of humor" | 42 |
| Smile producer | 14 |
| Punch line, perhaps | 19 |
| Piece of wordplay | 17 |
| Piece of corn? | 14 |
| Paronomastic witticism | 22 |
| One of about 3,000 in Shakespeare's plays | 45 |
| One may not be intended | 23 |
| Ogden Nash bit | 14 |
| Nash specialty | 14 |
| Many an "Airplane!" gag | 33 |
| Many a puzzle clue ending in "?" | 42 |
| Many a New York Post headline | 29 |
| Many a joke involves one | 24 |
| Many a Groucho Marx quip | 24 |
| Many a crossword clue | 21 |
| Many a comic strip character's name | 39 |
| Many a bon mot | 14 |
| Many a "?" clue in a crossword | 40 |
| Knock-knock joke's punch line, usually | 42 |
| 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 |