Related Clues:

• Insomniac's problem, maybe
• Itsy-bitsy bug
• Tiny parasite
• Itty-bitty biter
• To-do list notation
• Minuscule amount
• Sound of a time machine
• Tiny speck
• Tick relative
• Credit
• Creepy-crawly
• Pendulum accompaniment
• Small arachnid
• Charlotte, for one
• Watch's sound