Increase the general disorder (7)
I believe the answer is:
enlarge
'increase' is the definition.
(I know that enlarge is a more specific form of the action increase)
'general disorder' is the wordplay.
'disorder' indicates an anagram (a disordered version of the letters).
'general' anagrammed gives 'ENLARGE'.
'the' acts as a link.
(Other definitions for enlarge that I've seen before include "Lengthen" , "Expatiate" , "Gleaner (anag.)" , "Describe in more detail" , "swell?" .)