Company vehicles outside home on Sabbath (8)
I believe the answer is:
business
'company' is the definition.
(thesaurus)
'vehicles outside home on sabbath' is the wordplay.
'vehicles' becomes 'buses' (bus is a kind of vehicle).
'outside' is an insertion indicator.
'home' becomes 'in' ('he's home' can mean 'he's in'**).
'on' means one lot of letters go next to another.
'sabbath' becomes 's'.
'buses' going around 'in' is 'busines'.
'busines'+'s'='BUSINESS'
(Other definitions for business that I've seen before include "Occupation; trade" , "Commercial or industrial enterprise" , "complicated problem" , "Occupation; concern" , "Work - shop" .)