Related Clues:
- A white substance lying under black rock
- Stranger is on a bid for some dark glass
- Rock that sets one sailor spinning around another
- Degree conferred on mariner in 16
- A dark volcanic glass formed by very rapid solidification of lava
- Explosively blast a rock
- Some foreign aid is bought back as result of volcanic activity
- Rock band opening a season
- Kind of rock sailor turned over, then another
- Glassy rock
- ... graduate to Southern alternative rock
- Raised in Britain, aid is boosted by rock
- Glass is raised by detective in Scots town
- Estonian, say, collects a singular 25
- Rock's fundamental temperature