Live way out across end of suburbs (5)
I believe the answer is:
exist
'live' is the definition.
('exist' can be a synonym of 'live')
'way out across end of suburbs' is the wordplay.
'way out' becomes 'exit' ('exit' can be a synonym of 'way out').
'across' means one lot of letters goes inside another.
'end of' suggests the final letters.
The last letter of 'suburbs' is 's'.
'exit' going around 's' is 'EXIST'.
(Other definitions for exist that I've seen before include "Scrape by" , "Live" , "Get a life!" , "quick!" , "Have objective reality" .)