No one’s home in Albert Square is so disgusting (7)
I believe the answer is:
noisome
'so disgusting' is the definition.
(noisome means extremely disgusting or smelly)
'no one's home in albert square' is the wordplay.
'one's' becomes 'I's' (Roman numeral).
'home in albert square' becomes ''ome' ('home' said with a cockney accent, dropping the 'H').
'no'+'is'+'ome'='NOISOME'
'is' acts as a link.
(Other definitions for noisome that I've seen before include "Disgusting to sight or smell" , "Unpleasantly smelling" , "Evil-smelling - sounds loud" , "Rank" , "Nasty" .)