Underwear malfunction (4)
I believe the answer is:
slip
This could be a double definition.
'underwear' is the first definition.
(I know that slip is a type of underwear)
'malfunction' is the second definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for slip that I've seen before include "Glide; petticoat" , "Error; watered clay" , "He should take his chances" , "Minor mistake - undergarment" , "have an accident" .)