No term for mediocrity or stupidity? (6)
I believe the answer is:
idiocy
'stupidity?' is the definition.
(idiocy is a kind of stupidity)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for idiocy that I've seen before include "Great folly" , "Foolish action or behaviour" , "Stupid behaviour or talk" , "Extreme foolishness" , "Foolish act" .)