| It may be heard in a tunnel | 27 |
| It always returns your calls | 28 |
| High-low signal, in bridge | 26 |
| HELLO!... Hello!... hello ... | 29 |
| Ham's call word for E | 25 |
| Grand Canyon reverberation | 26 |
| Give a second hearing? | 22 |
| Feature of an empty house | 25 |
| Effect of a yodel, perhaps | 26 |
| E, in radio communications | 26 |
| E for ___ ; or reverberation | 28 |
| Dolphin's navigation aide | 29 |
| Canyon's sound effect | 25 |
| Bunnymen's leader? | 22 |
| Bouncer in an empty bar? | 24 |
| Bounce, as off a canyon wall | 28 |
| Bounce off the wall, in a way | 29 |
| Bat's navigational aid | 26 |
| A nymph pursued by Pan | 22 |
| A feature of this puzzle | 24 |
| "Me too" utterance | 28 |
| "Me too" response | 27 |
| ___ boomers (Generation Y) | 26 |
| Room with resounding walls | 26 |
| Recording studio feature | 24 |
| Sounded again and again | 23 |
| Signaled a card holding | 23 |
| Showed support for, in a way | 28 |
| Repeated word for word | 22 |
| Came back a little later | 24 |
| Bounced off the walls, say | 26 |
| Sounds in an empty hall | 23 |
| They repeat whatever you say | 28 |
| Rebounding sound waves | 22 |
| Has a lingering effect | 22 |
| Fills a chamber, in a way | 25 |
| Certain bridge signals | 22 |
| Resounding, as a canyon | 23 |
| Imitative of a natural sound | 28 |
| Coming right back at you? | 25 |
| Without auditory feedback | 25 |
| Lacking auditory feedback | 25 |
| Theologian who opposed Luther | 29 |
| Luther opponent Johann __ | 25 |
| Theologian Johann von __ | 24 |
| Luther opponent Johann | 22 |
| German theologian: 1486-1543 | 28 |
| German theologian Johann | 24 |
| Pâtisserie offering | 22 |
| Dieter's temptation | 23 |
| Temptation for a dieter | 23 |
| Custard-filled dessert | 22 |
| Chocolate-frosted treat | 23 |
| Pastry cart offering, perhaps | 29 |
| No dessert for a dieter | 23 |
| Napoleon's cousin? | 22 |
| Lacroix's cream puff | 24 |
| Custard-filled cream puff | 25 |
| Cream puff's cousin | 23 |
| Calorie-filled café choice | 29 |
| Custard-filled desserts | 23 |
| Napoleon's relatives | 24 |
| Custard-filled deserts | 22 |
| Mercedes sedan category | 23 |
| Mercedes-Benz model series | 26 |
| Mercedes-Benz luxury line | 25 |
| Standing ovation, e.g. | 22 |
| Extraordinary brilliance | 24 |
| Brilliance of performance | 25 |
| Elaborate display of pomp | 25 |
| Conspicuous brilliance | 22 |
| Wide-ranging, as tastes | 23 |
| Culled from diverse sources | 27 |
| Solar or lunar phenomenon | 25 |
| It may leave you in the dark | 28 |
| Astronomer's interest | 25 |
| Event of March 7, 1970 | 22 |
| "Green" prefix | 24 |
| Environmentalist's prefix | 29 |
| Friendly introduction? | 22 |
| Environmentally friendly | 24 |
| "Baudolino" author | 28 |
| Prefix with system or sphere | 28 |
| Budget, in brand names | 22 |
| Italian writer Umberto | 22 |
| Sphere or system starter | 24 |
| Prefix with management | 22 |
| Pro-environment prefix | 22 |
| Prefix with car or tour | 23 |
| Prefix for system or sphere | 27 |
| Prefix before friendly | 22 |
| Nature lover's prefix | 25 |
| Italian author Umberto | 22 |
| It means "green" | 26 |
| Environmental word form | 23 |
| Best-selling author Umberto | 27 |
| Wharton course for short | 25 |
| Tree-hugger's prefix | 24 |
| Terrorist or sphere preceder | 28 |
| System or sphere preceder | 25 |