Put back some disassembled clutter (4)
I believe the answer is:
mess
'clutter' is the definition.
(I've seen this before)
'put back some disassembled' is the wordplay.
'put back' says the letters should be written backwards.
'some' says the answer is hidden in the clue (some parts of the word are used).
'ssem' can be found hidden inside 'disassembled'.
'ssem' backwards is 'MESS'.
(Other definitions for mess that I've seen before include "Chaos, confusion" , "Military dining area" , "Military canteen" , "Jumble" , "State of disorder" .)