Row of houses (7)
'row of houses' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for terrace that I've seen before include "Stadium spectators' area" , "Urban housing" , "Group of non-detached houses" , "Balcony" , "stand" .)
I believe this is a double definition.
'row' is the first definition.
(I've seen this before)
'of houses?' is the second definition.
(I've seen this before)
(Other definitions for domestic that I've seen before include "violent incident at home" , "Concerning home affairs" , "Used in the home" , "Relating to the household" , "Daily" .)