- a disorderly pile of clothes.
- a secret agent.
- an undercover investigation.
- clandestine intelligence operations.
- cloak-and-dagger activities behind enemy lines.
- he engaged in the hugger-mugger of international finance.
- hole-and-corner intrigue.
- secret missions.
- secret sales of arms.
- surreptitious mobilization of troops.
- they did it all hugger-mugger.
- underground resistance.