Related Clues:

• Of interest to some physicists
• Kind of clock or bomb
• Quite tiny
• Suburb, for instance
• Company __
• It may have a square in the middle
• Big village
• Hall or pump preceder
• City relative
• Word with "energy" or "submarine"
• Won't be about population centre
• This energy is nuclear
• Referring to the smallest component
• Relating to minute matter
• Referring to the tiny particle