Untidy, unkempt (7)
I believe the answer is:
scruffy
This clue is a double definition.
'untidy' is the first definition.
(similar in meaning)
'unkempt' is the second definition.
(I've seen this before)
(Other definitions for scruffy that I've seen before include "Ill-groomed" , "Untidy, dirty" , "Shabby and untidy" , "Female deer" , "dishevelled" .)