| Clue | Source | Date |
|---|---|---|
| What might keep you up at night? | New York Times | 19 Mar 2025 |
| Supporter of a king or queen, perhaps | ||
| Supporter of a king, perhaps | Wall Street Journal | 14 Nov 2019 |
| Mattress support | USA Today | 23 Feb 2019 |
| Mattress support | ||
| Mattress support | Newsday | 29 Nov 2017 |
| Mattress-supporting board | USA Today | 18 Oct 2017 |
| Mattress supporter | USA Today | 22 Apr 2017 |
| Mattress supporter | ||
| Mattress-supporting board | ||
| Wooden support of a sort |