Possible Clues:

• A very small measure of strong rum in the morning
• Physicist’s unusually strong backing graduate receives
• Swedish physicist’s torment, having reduced capital
• Fear Gypsies dropping back a short distance
• Worry with traveller’s very small distance to cover?
• Worry over radiation initially given to doctor returning to X-ray unit
• Tiny unit of length
• A measure of anxiety when confronted with memory
• Minute length
• Swedish physicist's deep uncertainty over computer storage