| Answer | Crossword Clue |
|---|---|
| SPIED | Did secret work |
| SPIED | Did secret-agent work |
| SPIED | What the secret agents did. |
| ALGAEBRAS | What did the mathematical mermaid buy at Victoria's Secret? |
| INFILTRATE | Do secret-agent work |
| SHRED | Work on secret papers, in a way |
| undercover | (of a person or their activities) Involved in or involving secret work within a community or organization, esp. for the purposes of police investigation or espionage |
