General disorder one gathers (7)
I believe the answer is:
gleaner
'one gathers' is the definition.
(I've seen this before)
'general disorder' is the wordplay.
'disorder' indicates anagramming the letters (a disordered version of the letters).
'general' with letters rearranged gives 'GLEANER'.
(Other definitions for gleaner that I've seen before include "one gathers" , "Leftover grain gatherer" , "Collector of leftover grain after a harvest" , "One gathering (grain) after a harvest" , "Person gathering" .)