Rubbish untidy, natural state (6)
I believe the answer is:
nudity
'natural state' is the definition.
(I've seen this before)
'rubbish untidy' is the wordplay.
'rubbish' indicates an anagram (a poor quality or rubbish spelling of the letters).
'untidy' is an anagram of 'NUDITY'.
(Other definitions for nudity that I've seen before include "State of being without clothes" , "Moving at high speed" , "State of nature" , "State of complete undress" , "Bareness" .)