Go within to start isolating new tenants outside (4)
I believe the answer is:
into
'go within' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'start isolating new tenants outside' is the wordplay.
'start' says to take the initial letters.
The initial letters of 'isolating new tenants outside' is 'INTO'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for into that I've seen before include "Curious about" , "A fan of" , "To a point within - not I" , "Expression of division" , "Four this twelve is three" .)