| Clue | Answer |
|---|---|
|
|
|
| Detectives, for short (3) | |
| Geometry textbook symbols (3) | |
| Sleuths, for short (3) | |
| Geometry students' symbols (3) | |
|
|
|
| Nero Wolfe and Sam Spade, briefly (4) | |
| P.I.'s (4) | |