Related Clues:

• It's obvious at last that there's power here
• Not plain why he should get the artist back
• It's not obvious that this is a relatively backward artist
• It's obvious at last that this may be explosive
• Relatively murky turn to start 6 down
• Relatively (but not obviously) he gets the artist up
• It's obvious at last it's for a Tom
• Speaking of new patent type of bomb
• Greek character to vindicate form of energy
• Dotty uncle has a right to some kind of family
• Greek character's explicit description of weapon
• Central rule can break down
• Nice one to come up with 20 type of energy
• London university admitted to threatening sort of war
• Vessel enables uranium to be transported with care, oddly