Family, our people, seen in garden (5)
I believe the answer is:
'family' is the definition.
(eg a royal house)
'our people seen in garden' is the wordplay.
'our people' becomes 'us' (us refers to 'our' group or our people).
'seen in' indicates putting letters inside.
'garden' becomes 'hoe' (to garden could mean to hoe).
'us' put inside 'hoe' is 'HOUSE'.
(Other definitions for house that I've seen before include "Bingo hall cry" , "Residence, dwelling" , "Game; theatre; institution" , "Firm; home" , "Accommodate" .)