Untidy type (4)
I believe the answer is:
slob
'untidy type' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for slob that I've seen before include "Uncouth person" , "Slovenly layabout" , "Fat, idle person" , "'Slovenly, messy person (4)'" , "Fat, idle type" .)