Increase the confusion of the general (7)
I believe the answer is:
enlarge
'increase' is the definition.
(I know that enlarge is a more specific form of the action grow)
'confusion of the general' is the wordplay.
'confusion of' indicates an anagram (I've seen this in other clues).
'general' with letters rearranged gives 'ENLARGE'.
'the' is the link.
(Other definitions for enlarge that I've seen before include "Make bigger, say photo" , "Blow up" , "Lengthen" , "Make big" , "Make bigger in general" .)