| Answer | Crossword Clue |
|---|---|
| STRATO | Cumulus opener |
| HEAP | Cumulus |
| MASS | Cumulus |
| HEAP | Cumulus. |
| PILE | Cumulus |
| STRATO | ...-cumulus. |
| CLOUD | Cumulus |
| STRATO | Cumulus start |
| STRATO | ...-cumulus cloud. |
| CLOUD | Cirrus or cumulus. |
| PUFFY | Like cumulus clouds |
| ALTO | Cumulus lead-in |
| ALTO | Starter for cumulus |
| CLOUDS | Cumulus and cirrus |
| ALTO | Prefix with cumulus |
| CLOUD | Cirrus or cumulus |
| CIRRO | Prefix with cumulus |
| STRATO | Prefix with cumulus |
| FLEECY | Like cumulus clouds |
| CLOUDS | Cirrus, nimbus, cumulus, etc. |
| ALTO | Lead-in to cumulus |
| PUFFY | Like a cumulus cloud |
| FLEECIEST | Most like a cumulus cloud |
| ALTO | Lead-in to stratus or cumulus |
