Idiot seen in Kansas in odd places (3)
I believe the answer is:
ass
'idiot' is the definition.
(I've seen this before)
'kansas in odd places' is the wordplay.
'in odd places' means one should take alternating letters (only odd-numbered letters).
The alternate letters of 'kansas' are 'ASS'.
'seen in' acts as a link.
(Other definitions for ass that I've seen before include "Buffoon" , "sap" , "One easily had" , "Idiotic animal" , "Stupid fellow" .)