Object to wits (4)
I believe the answer is:
mind
I believe this clue is a double definition.
'object to' is the first definition.
(I've seen this before)
'wits' is the second definition.
(thesaurus)
(Other definitions for mind that I've seen before include "Intellect; object to" , "This can be made up" , "Consciousness" , "Brain" , "Take care of; intellect" .)