Possible Clues:

• Tiny margin of safety for Damocles
• Little space between two parts of locks for feeding the ducks on a fair amount of the path (4'1,7)
• Very small margin showing musical's range
• Habits harder to change in small measure
• Little space between two segments of locks for feeding the ducks on half the path (4'1,7)
• Off top of one's head, thickness is very close, but not close enough
• Reveals money, last bit in wallet, carried in hands initially for short distance
• Hear hunted animal's panting, rounding front of dog - so tiny a distance
• This hard, bare ground makes little difference
• Narrow margin by which Damocles escaped death?