Clean home out for reptile (9)
I believe the answer is:
chameleon
'reptile' is the definition.
(chameleon is a kind of reptile)
'clean home out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'clean'+'home'='cleanhome'
'cleanhome' is an anagram of 'CHAMELEON'.
'for' acts as a link.
(Other definitions for chameleon that I've seen before include "It blends" , "person who's changeable" , "colour changer" , "Small lizard able to change colour" , "Variable-colour reptile" .)