Contain our group in garden (5)
I believe the answer is:
house
'contain' is the definition.
(housing is a kind of containing)
'our group in garden' is the wordplay.
'our group' becomes 'us'.
'in' indicates putting letters inside.
'garden' becomes 'hoe' (to garden could mean to hoe).
'us' placed into 'hoe' is 'HOUSE'.
(Other definitions for house that I've seen before include "Dwelling-place" , "Residence; legislative meeting-place" , "Residential building" , "Dwelling; dynasty" , "Home building" .)