Location not as clean (8)
I believe the answer is:
spotless
'clean' is the definition.
(similar in meaning)
'location not' is the wordplay.
'location' becomes 'spot' (spot is a kind of location).
'not' becomes 'less' (I've seen this in other clues).
'spot'+'less'='SPOTLESS'
'as' acts as a link.
(Other definitions for spotless that I've seen before include "Without a mark, completely clean" , "What unsuccessful twitchers do" , "Perfect" , "Fully clean" , "How Lady Macbeth wanted to be" .)