| DETECTIVES | What 17-Across and 29-Across are in Agatha Christie mysteries |
| SMARTLESS | Popular comedy podcast hosted by Will Arnett, 17-Across, and 29-Across |
| AVERAGEGUYS | Regular dudes: 2 wds. (Theme answer: The first words of this answer and 29-Across are similar concepts in statistics, and the second words are both gendered plurals.) |
| GUITARPICKUP | Instrument attachment whose second word is a type of truck with a spacious cargo bed: 2 wds. (Theme answer: The first words of this answer and 29-Across are stringed instruments, and the second words |
| GILLIANFLYNN | Author who wrote the novels from which 17-Across and 29-/31-Across were adapted: 2 wds. |
| POISON | Staple of Agatha Christie mysteries |
| TWISTS | Features of Agatha Christie mysteries |
| TRIPLICATE | *Some 29-Across are submitted in this |
| ARSENIC | In Agatha Christie's After The Funeral, in what has a piece of wedding cake been soaked? (7) |
| TUPPENCE | Little change previously seen in Agatha Christie detective (8) |
| POIROT | Belgian detective featured in Agatha Christie novels |
| NOOSE | Last method of death in Agatha Christie's "And Then There Were None" |
| OWEN | U. N. ___ (mysterious host in Agatha Christie's "And Then There Were None") |
| CYANIDE | In Agatha Christie's A Pocketful of Rye, what poison killed Mrs Fortescue? (7) |
| NORM | Pattern in Agatha Christie novel |
| JAPP | Inspector in Agatha Christie novels |
| VICARAGE | Word for the clergy house or parsonage where a murder takes place in Agatha Christie's debut Miss Marple novel first published by the Collins Crime Club in 1930 (8) |
| CLARKE | Sir Carmichael ___, the C of murder victims in in Agatha Christie's novel The ABC Murders |
| ANDOVER | In Agatha Christie's The ABC Murders, the first murder is in this Hampshire town (7) |
| SERGEANTTROTTER | Detective character in Agatha Christie's popular murder mystery play The Mousetrap (8,7) |
