Vacuum house: finished (6)
I believe the answer is:
hoover
'vacuum' is the definition.
(Hoover is an example)
'house finished' is the wordplay.
'house' becomes 'ho' (abbreviation for house).
'finished' becomes 'over' ('over' can be similar in meaning to 'finished').
'ho'+'over'='HOOVER'
(Other definitions for hoover that I've seen before include "US president, 1929-33" , "J Edgar ...... was FBI boss." , "Vacuum cleaner of the old American president" , "Former president of US and vacuum cleaner" , "Clean with vacuum cleaner" .)