Related Clues:
- Form of oxygen in earth's upper atmosphere - there's a hole in it
- Layer that protects against ultraviolet rays
- Gas used in Tokyo subway attack in 1995
- Oh, three round the region!
- Oh, area! Oh, three!
- There's gas round that area
- Down Under one may have great gas
- Is one from Australia such great gas?
- Oh, three with one at the end
- Great gas to be part of a layer around the area
- Oh, three for a layer
- 0 and three more for a layer
- It takes a wizard to get a layer with one
- After Australia one finds this great gas
- The one from Australia with the layer - great gas!