Repeatedly taking time outsmarting crazy dunce (9)
I believe the answer is:
ignoramus
'dunce' is the definition.
(I've seen this before)
'repeatedly taking time outsmarting crazy' is the wordplay.
I cannot really see how this works, but
'time' could be 'am' and 'am' is located in the answer.
This explanation may well be incorrect...
(Other definitions for ignoramus that I've seen before include "Uninformed sort" , "unwitting person" , "Ron is a mug (anag.)" , "Fool" , "Stupid person" .)