Add to the general confusion (7)
I believe the answer is:
enlarge
'add to' is the definition.
(thesaurus)
'general confusion' is the wordplay.
'confusion' indicates an anagram.
'general' with letters rearranged gives 'ENLARGE'.
'the' acts as a link.
(Other definitions for enlarge that I've seen before include "Widen" , "Stretch" , "Make bigger in general" , "Wax" , "Dilate" .)