| Clue | Source | Date |
|---|---|---|
| Amass knowledge (4,2) | ||
| Do some research | Universal | 12 Dec 2023 |
| Get educated (on) | New York Times | 20 Mar 2023 |
| Study | Thomas Joseph | 28 Feb 2023 |
| Do research (on) | Newsday | 27 Oct 2022 |
| Study, with 'on' | The Washington Post | 02 Jul 2021 |
| Study, with "on" | LA Times Daily | 02 Jul 2021 |
| Study, with "on" | The New Yorker | 03 Feb 2020 |
| Do some research | Wall Street Journal | 24 Apr 2019 |
| Do research (on) | New York Times | 21 Apr 2019 |
| Do some research | ||
| Do research (on) | ||
| Study, with 'on' | New York Times | 30 Jan 2018 |
| Study, with "on" | ||
| Study | Thomas Joseph | 21 Jan 2017 |
| Study | The Times Concise | 30 Sep 2016 |
| Get educated (on) | New York Times | 15 Mar 2015 |
| Get educated (on) | ||
| Do research | ||
| Do research (on) | ||
| Do research (on) | ||
| Gather information (on) | ||
| Study | ||
| Study, with "on" | ||
| Acquire background | ||
| Study (with "on") | ||
| Study, with "on" | ||
| Study, with "on" | ||
| Do research | ||
| Gather information (on) | ||
| Gather information (on) | ||
| Gathered info (on) | ||
| ___ on (gather facts) | ||
| Words on a timetable | ||
| ___ on (study a subject). |