Folly and rudeness — there's little right in that (10)
I believe the answer is:
imprudence
'folly' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for imprudence that I've seen before include "stupid behaviour" , "Injudicious act" , "indiscretion" , "Folly" , "lack of caution" .)