I would clean it out, just the same (9)
I believe the answer is:
identical
'just the same' is the definition.
(I've seen this before)
'i would clean it out' is the wordplay.
'i would' becomes 'I'd'.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'clean'+'it'='cleanit'
'cleanit' is an anagram of 'entical'.
'id'+'entical'='IDENTICAL'
(Other definitions for identical that I've seen before include "Like two peas in a pod" , "Matching" , "as B and B" , "Aid client to be the very same" , "not distinguished" .)