Related Clues:

• -- of the tongue
• Short period of forgetfulness
• Tongue mishap
• ''A Momentary ___ of Reason'' (Pink Floyd)
• Mini-slip?
• Momentary goof
• Memory ___
• Memory mishap
• Accidental gap
• Negligence
• Fall into disuse
• Memory failure, e.g.
• Senior moment
• Run out, as a policy
• Minor failing