Garment put on at home (7)
I believe the answer is:
habitat
'home' is the definition.
(thesaurus)
'garment put on at' is the wordplay.
'garment' becomes 'habit' (habiting is a kind of garmenting**).
'put on' means one lot of letters go next to another.
'habit'+'at'='HABITAT'
(Other definitions for habitat that I've seen before include "Animal's environment" , "Territory" , "Environment in which groups normally live" , "Natural home or haunt" , "Environment in which an organism normally lives" .)