| Clue | Source | Date |
|---|---|---|
| A subject for deep study (12) | ||
| Main subject taken by students | ||
| Would a student take it as his main subject? (12) | ||
| The main subject read by some students (12) | ||
| Study of the sea | Mirror Tea Time | 29 Jan 2024 |
| Coy orphan, age uncertain, a subject for deep study | The Guardian Cryptic | 14 Jan 2022 |
| Coy orphan, age uncertain, a subject for deep study | ||
| Subject calling for deep consideration? | The Telegraph Toughie | 31 Jan 2019 |
| Orphanage coy about study in the main | ||
| Deep study |