Disorganised, leave today without packing (6)
I believe the answer is:
scatty
'disorganised' is the definition.
(scatty means disorganised or absent-minded)
'leave today without packing' is the wordplay.
I cannot really see how this works, but
'leave' could be 'scat' (I've seen this before) and 'scat' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for scatty that I've seen before include "Slightly crazy" , "Slightly eccentric" , "Bird-witted" , "Disorganised, unpredictable" , "Empty-headed" .)