Discombobulate (5)
I believe the answer is:
addle
'discombobulate' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for addle that I've seen before include "confusing" , "(Of eggs) turn bad" , "Confuse; go off" , "Befuddle" , "Muddle or confuse" .)