| Peruvian river |
| Dashboard abbreviation |
| Scandinavian region |
| Cornerstone abbreviation |
| Latvia's largest city |
| Latvia neighbor |
| Universal's 1980 Olivia Newton-John musical |
| A primary source for Scandinavian mythology |
| 15th-century Peruvian |
| Act ___, "La Traviata" finale |
| Abbreviated date |
| Alternative title of this puzzle, in view of what can be placed in front of the answers to the 10 asterisked clues |
| Avian sources of red meat |
| Abbreviation before a person's name on a business envelope |
| ___. Reg. Mgr. (abbreviated title for Dwight Schrute) |
| Abbreviation on some "as is" merchandise |
| Trivial stuff |
| Scandinavian goblin |
| Caviar or frogs' legs |
| Scandinavian capital? |
| Peruvian metropolis |
| Abbreviation at the end of some lists |
| Concludes one's court case |
| Ancient Scandinavian |
| Abbreviation before the names of the recipients of a memo |
| Abbreviation for a state that shares its name with a country band |
| Abbreviated procedure |
| Computer abbreviation |
| Abbreviated LAX postings |
| Creepy pencil-and-paper "game" popularized in 2015 via YouTube and Twitter (and basis of the theme answers) |