| Answer | Crossword Clue |
|---|---|
| HOTBEDS | Activity centers |
| HUBS | Activity centers |
| LOCI | Activity centers |
| HUBS | Centers of activity. |
| HUBS | Centers of activity |
| FOCI | Centers of activity. |
| FOCI | Centers of activity |
| LOCI | Centers of activity |
| MECCAS | Centers ofj activity |
| HOTBEDS | Centers of activity |
| HIVES | Centers of activity |
| LOCI | Centers of great activity |
| DENS | Centers of secret activity |
| HUBS | Chief centers of important activity. |
