Own house containing opening for electric lift! (5,2)
I believe the answer is:
heave ho
'lift' is the definition.
(exclamation used when lifting something)
'own house containing opening for electric' is the wordplay.
'own' becomes 'have' (synonyms).
'house' becomes 'ho' (abbreviation for house).
'containing' means one lot of letters goes inside another.
'opening for' says to take the initial letters.
The initial letter of 'electric' is 'e'.
'have'+'ho'='haveho'
'haveho' going around 'e' is 'HEAVE-HO'.
(Other definitions for heave ho that I've seen before include "Rejection" , "dismissal" , "Notice" , "sack" , "Drake's cry" .)