Related Clues:
- Out of the storm
- Suitable for rainy days
- Behind the scenes
- Like some playgrounds
- Away from the elements
- Not outside
- Safe at home
- With 71-Across, one way to think (with a hint to this puzzle's theme)
- Known only to a select few
- Out of the rain
- Opposite of alfresco
- Confidential
- Like gym sports
- Not for the outside
- Like fireworks, infrequently