Adds to confusion in conflict (2,4)
I believe the answer is:
at odds
'in conflict' is the definition.
(I've seen this before)
'adds to confusion' is the wordplay.
'confusion' is an anagram indicator.
'adds'+'to'='addsto'
'addsto' is an anagram of 'AT ODDS'.
(Other definitions for at odds that I've seen before include "Opposed, in conflict with" , "On bad terms" , "In conflict with, oppposed to (2,4)" , "Conflicting (with)" , "Not in agreement" .)