Approve art house I rebuilt (9)
I believe the answer is:
authorise
'approve' is the definition.
('approve'->'authorize' is in my internal thesaurus and 'ize'->'ise')
'art house i rebuilt' is the wordplay.
'rebuilt' indicates an anagram.
'art'+'house'+'i'='arthousei'
'arthousei' is an anagram of 'AUTHORISE'.
(Other definitions for authorise that I've seen before include "I share out (anag.)" , "licence" , "OK" , "Give power to or sanction" , "commission" .)